List of goofs/Season 1

Tourist Trapped

 * In this episode, Gravity Falls is shown to be in the center of Oregon, but in subsequent episodes, Gravity Falls is shown to be in Eastern Oregon.
 * Corvallis is spelled "Corvalis" on the map of Oregon.
 * While Dipper is reading from Journal 3, he reads "studying" even though the book said "researching."
 * The hand on the cover of Journal 3 alternates between five and six fingers in several scenes.
 * The triangle stained window is centered with a double ring from the inside, but from the outside it has a single ring.
 * When Dipper is showing Journal 3 to Mabel, the page Dipper wrote at the end of the episode can be seen, even though he hadn't written that page yet.S1e1 dipper entry page 2.jpg
 * The order of the pages in Journal 3 are different between the first time Dipper opens the Journal and when he shows Mabel the journal when he attempts to convince her that Norman is a zombie.
 * When Mabel goes to meet Norman at the shack's front door, the words "Meow Wow" on her sweater frequently disappear.
 * When Dipper and Mabel are being chased, a rear shot of the back of the Mystery Cart shows that Dipper's hat is missing despite it being present in the preceding and following shots.
 * After Dipper and Mabel crash the Mystery Cart, its position moves several times throughout the scene.
 * When Mabel is responding to Jeff's proposal, Jeff's beard is red instead of brown.
 * When Mabel says "You may kiss the bride," the leaves in her hair disappear, but after they shoot Jeff away the leaves return.

The Legend of the Gobblewonker

 * When Mabel says "blah" after coughing on syrup, her mouth doesn't move.
 * During Mabel's daydream with the hamster ball, Xyler has blue framed sunglasses and Craz had pink framed sunglasses. After Mabel talks to them, they both have pink frames.
 * Stan's license plate reads "STNLYMBL" which is 8 characters long, but in the state of Oregon, the maximum number of characters allowed on a license plate is 6. Even if Stan kept the license plate on the car from New Jersey, the maximum number of characters is 7, still too short. (This could also mean that Stan's car is illegal.)
 * Stan is on his boat with nothing but then appears to having a fishing box with him the next scene.
 * As Dipper says "change of plans," to Stan, a gap opens in the line that makes up Mabel's hair, only to vanish a few second later.
 * The last two letters of Dipper's fishing hat are missing when Stan gives them to him and Mabel, but later all the letters are back. (Although this may imply multiple fishing trips, due to some pictures showing earlier times of the day.)
 * When Old Man McGucket says "Aw, banjo polish!" when he was leaving the screen, his mouth didn't move.
 * In one scene, Dipper brings his hand down on a cooler, smashing a camera. However, in the previous scene, the cooler is behind him.
 * When Soos grabs Dipper by the top of the life-jacket when they are running away from the Gobblewonker, one shot shows Dipper wearing the life jacket, and it is raised up so you can see his stomach. However, when the shot pans out, the shirt that he is wearing under his life jacket covers up his stomach.
 * When the boat drives through the glass pane, the robot Gobblewonker disappears until Soos, Dipper, and Mabel are about to crash in the cave.
 * When Soos is throwing the cameras at the Gobblewonker, some cameras randomly appear in his hand.
 * Before Dipper took the first group picture you can see Soos' arm, but in the picture you don't.
 * When Soos loses his shirt, it reappears during one of the fishing pictures and disappeared again after the pictures. (Although this may imply multiple fishing trips, due to some pictures showing earlier times of the day.)

Headhunters

 * Wax Larry King is first shown to be the same height as Wax Sherlock Holmes, but in another scene he is much shorter.
 * Mabel's eyebrows and eyelashes are missing just before she says "Are you saying you could outwit Duck-tective?"
 * Mabel's drawings of her sculpture ideas had color, but she was only using one regular pencil.
 * Shandra Jimenez can not be seen among the crowd at the re-opening of the Wax Museum of Mystery, but she appears when Mabel calls on her for questions.
 * When Sheriff Blubs and Deputy Durland are laughing at Dipper, Wax Stan briefly disappears.
 * When Mabel leans forwards to say, "Even us!" the button on her disposable camera disappears.
 * The footprints with holes are the right ones, but the first left footprint has a hole while the first right one does not.
 * Dipper and Mabel make a scribbled line on Mikey R.'s row on their checklist. However, in a later scene, this mark is instead shown on the Angry lady's row.
 * When Deputy Durland and Sheriff Blubs raid Toby Determined's office, Deputy Durland says "Derp" without moving his mouth.
 * When the security footage of Toby is shown the first time, the clock starts at 10:00 and the seconds are at 1. But the second time it is shown, the seconds are back at 0 and the clock still says 10:00.
 * In the flashback where wax Sherlock Holmes decapitates wax Stan and he looks at the head, the design on the hat is missing the little triangle.
 * The wax figures say they come alive during a waxing moon, but the moon shown during the fight between Dipper and Wax Sherlock Holmes is waning.
 * When Stan regains Wax Stan's head after the battle, the color of the band on the back of his fez changes color for a few frames, from yellow to red, and then it goes back to normal.

The Hand That Rocks the Mabel

 * At one point, on the outside of the Mystery Shack the sign says "World Papov" instead of "World Famous."
 * When Mabel blinks, the "bezazzles" on her right eye fall off, but they later return.
 * Before Mabel shows her makeover to Dipper, Dipper's book appears to be Journal 2 instead of 3. The book labeled 2 belongs to Gideon Gleeful, so this is impossible. Alex Hirsch acknowledged that this was, in fact, an animation error.
 * When Mabel complains that Dipper never does girly stuff with her, Dipper sets Journal 3 on the chair, but when Soos enters, the book is gone.
 * In the shot of Dipper and Mabel playing video games, the collar on Mabel's sweater has stripes. In all the other shots, it does not.
 * When Gideon and Mabel are on their date, we never see Mabel's glass filled with water and yet when the waiter leaves, it is full of water.
 * When Stan tells Mabel that she has to marry Gideon, the symbol on his fez is missing.
 * When Bud enters Gideon's room, the photo Gideon burns is not shown on the door.
 * When Dipper and Mabel are playing with Soos, Mabel is wearing a sea-foam green-colored headband, but when Dipper hears the phone ring, her headband changes to red, then back to sea-foam green.
 * When Mabel and Dipper are sitting on the chair, the umbrella on Mabel's sweater is disappears, then reappears partly.
 * The three journals all have 4 gold corners on the front cover in each corner. When it is revealed at the end of the episode that Gideon has Journal 2, the bottom left corner is red instead of gold when he closes the book.
 * During the end credits, there are a number of errors.
 * Soos, Mabel and Dipper are using a flashlight, but it did not cast a shadow.
 * When Soos spins to the side with no jewels on it, the wall still has the disco ball effect.
 * The light reflections rotate in the opposite direction Soos is spinning.
 * The lights on the wall travel much slower than Soos is rotating.
 * In a frame when Mabel is wondering how Gideon Gleeful found out her name all but one of her teeth are missing.

The Inconveniencing

 * When Dipper high-fives Wendy, he does so with his right hand, but in the following shot he is using his left hand.
 * When Dipper is seen with his clipboard in the backround, his pen is in his left hand. In the next shot, it switches to his right, and then back to his left in the next shot.
 * Tambry is not present in the minivan when Thompson drives the gang to Dusk 2 Dawn, even though there was a seat next to Mabel and Dipper.S1e5 thompson car 02.png
 * When Mabel says "This is going to blow someone's mind," the pine tree on Dipper's hat is outlined in black.
 * The fence surrounding the Dusk 2 Dawn changes height from shot to shot.
 * When Dipper is trying to climb over the fence, Lee is on the same side as everyone else, the same side as Dusk 2 Dawn. However, before he pushes Dipper off the fence, he seems to be climbing from the outermost side of the fence, as if he were going in.
 * When Dipper is opening the vent to get inside, Tambry's leggings briefly vanish.
 * When the newspaper is on the stand, the title reads USA WEEK, but when Dipper rubs off the dust, the title says USA NEWZ.
 * When Nate and Robbie are putting ice in Thompson's pants, Robbie is missing his pimples and piercings, and his nose is the same color as his skin.
 * When the three teens' reflections are shown in the window as normal, Tambry's reflection is smiling, but Tambry herself is not.
 * In the same shot, Tambry's leggings are missing.
 * Robbie's reflection is not mirror-imaged.
 * Wendy's mouth is not mirror-imaged.
 * Thompson parks the minivan outside the fence when they arrive, but when Pa opens the doors, the minivan is inside the fence. When the teens leave, the minivan is outside the fence again.
 * Ma and Pa Duskerton collapse from heart attacks by the window near the front door, but their bodies are chalked near the end of the store.
 * In the chalk outline, Ma's arms are sprawled out, but when she collapsed her arms were on her chest.
 * When Thompson is first seen playing Dancy Pants Revolution, the arrow that points left is white. When he gets trapped in the game, it is pink.
 * When Dipper does the Lamby Lamby Dance, Ma's name tag is on her shirt, but when he finishes, it is gone.
 * When Wendy is telling everyone about how Dipper saved them, the mud on her boots is at the top, but in another shot, the mud is on the bottom of her boots. In the same scene, Dipper has a peach-colored nose instead of a red one.
 * The open and closed sign changes from open to closed many times in different scenes.

Dipper vs. Manliness

 * When Sheriff Blubs is eating pancakes, he appears to be almost done. However, in a later shot, more pancakes have appeared.
 * In the shot where Stan and Mabel laugh at Dipper, the Manliness tester's sign says "Manliess."
 * Dipper throws down the beef jerky on the ground and Chutzpar eats it. In a later shot, the jerky has disappeared.
 * When Soos runs out the door, the door moves a little and then stops, but the style of the door and its position makes this impossible.
 * When Mabel gets an idea, Soos' shirt is pink, but when Mabel gets up his shirt is back to normal.

Double Dipper

 * When Stan tells Soos that it's no one's birthday, his bow tie disappears.
 * When Mabel sprays her silly string at Dipper in the copier room, the string comes out of the side instead of the nozzle.
 * When Dipper drops his spray deodorant, the appearance of the can changes.
 * When Dipper reaches for his spray deodorant, there is no can on the box. In the next shot, a can appears.
 * Some of the people from inside of the party reappear in the line by the ticket stand.
 * One of kids near the front of the line is missing arms.
 * When Wendy leaves Dipper to man the table by himself and she starts dancing inside, for a few frames her left shoulder is filled red.
 * When Mabel was dancing, there is a chair next to Candy Chiu but in the next scene, when she sits down to drink water, the chair disappears.
 * When Grenda says, "Hold me, Candy," Mabel has two right eyebrows. As she turns to face Pacifica, her upper eyebrow comes down and vanishes into the lower one.
 * Robbie plays his electric guitar despite the fact it is not plugged in to an amplifier.
 * Tambry's hair is drawn mirrored for the entire episode.
 * When Wendy tells Dipper she and Robbie are going to go sit on the couch, Dipper's bow tie is missing.
 * When Paper Jam Dipper emerges from the paper, part of his shoe is missing for a frame.
 * When Dipper is telling Soos that someone stole Robbie's dirt bike, his colors are faded like the clones'.
 * The "Wendy Mix" starts playing before Clone #10 puts it in.
 * When Dipper bends down to pick up his cup, there is a chair, but when he stands up the chair is gone.
 * Pacifica is shown to be on the dance floor when Wendy is waiting for the bathroom. Moments later, Pacifica emerges from the bathroom.
 * When Pacifica Northwest comes out of the bathroom, her colors are faded.
 * When the clones confront Dipper while Wendy is in the bathroom, the copies of "Wendy Plan B" are the same as the first plan.
 * The red spreader stick in the crackers and cheese snack is not visible in the package, but it appears in Dipper's hand.
 * Dipper sets off the fire sprinklers with smoke from a party popper. However, fire sprinklers are activated by heat, not smoke.
 * Right before Dipper and Tyrone say, "We blew it, man," Tyrone's hand is a frame early for several frames, causing his hand to be severed.
 * In the last scene, the Mystery Shack's address is written as 616 instead of 618.

Irrational Treasure

 * Mabel's nacho earrings appear and disappear from shot to shot.
 * When Stan says "I will break you, Little Man!" to Toby Determined, the line between his eyes (part of his glasses) disappears.
 * When Gompers is at the wedding ceremony, his right horn is broken instead of his left horn.
 * The microphone on the podium appears and disappears from shot to shot.
 * When the Northwest family has their picture taken, the Nathaniel Northwest statue changes from facing left to right. Later, it faces left again.
 * While Dipper and Mabel read about the conspiracy in front of the statue, the bottom of Dipper's shoes change from white to black.
 * When the statue of Nathaniel Northwest is first seen, it is in front of a church. However, when Dipper is reading 3, there is a group of trees behind the statue.
 * When Dipper removes the document, the red spots on Mabel's cheeks disappear.
 * When Dipper is going through the slides in the library, one is entitled "Numerology," but contains astrological symbols.
 * When the twins exit the museum, the right hand door is open, however when the officers leave, the other door is the only one open.
 * Mabel's mouth doesn't move when she laughs after Dipper says to look out for "booby traps."
 * In the top secret document that reveals Quentin Trembley as the founder of Gravity Falls, in the second paragraph, the "Falls" in "Gravity Falls" isn't capitalized.
 * While watching the video, Mabel's eyebrows raise in surprise at the revelation that Quentin Trembley was once president. Her expression then shifts to confusion and her left eyebrow curves down onto her eye, but the surprised eyebrow is still on her face, giving her three eyebrows.
 * Quentin Trembley's expression changes throughout different scenes while inside the block of peanut brittle.
 * When the twins and Trembley climb the ladder to the top of the train, they are in the rear car. However, when they emerge on the top of the train, there are more train cars behind them.
 * When the trio are trapped in the crate, it has a roof, but just before it falls apart the roof disappears.
 * When Dipper is running towards Pacifica to tell her about Quentin Trembley, Mabel's headband disappears.

The Time Traveler's Pig

 * The caramel apple Mabel feeds Waddles disappears after she drops it.
 * When Mabel sat on the Test Your Strength game, the marker did not move when she got off, but it should have gone to 0 since it is impossible for Mabel to weigh 0 pounds.
 * Mabel's eyes are parted in the middle in one frame.
 * Dipper's question mark corn dog disappears when Robbie shows up.
 * When the Unnamed hillbilly throws balls at the dunk tank, his right hand is shown with no half-finger missing.
 * When Wendy first sees the stuffed animals, they are seated on a board, but in all of the other shots, they are hanging on a rack.
 * When Waddles is dressed as a doctor, his nose color briefly changes.
 * When Dipper and Mabel are talking to Blendin, Dipper's hat turns navy blue instead of its normal shade of blue.
 * When Blendin's "position is compromised" after he failed to hide, his watch switches from his left hand to his right hand.
 * After Mabel hands Blendin tickets to the fair and he leaves, Mabel turns to the side, and the flower in her hair has vanished.
 * When Blendin walks to the barrel ride, the time machine is not on his belt. When the camera zooms in, it is.
 * When Dipper and Mabel high-five each other in the Mystery Shack, Mabel's braces and dimple marks are missing.
 * After the fire from the first do-over created a mark on Dipper's hat, it remains there for the rest of the episode. In some scenes, however, the burn mark disappears. For example, the burn mark is not present while Dipper is doing calculations on the glass.
 * When Mabel is riding the Ferris wheel with Waddles the ticket booth in front of the Ferris wheel is facing to the right. In all the other "do-overs," it is facing toward the front.
 * When Robbie talks to Wendy in Dipper's final do-over, there is a frame in which his teeth are skin-colored as opposed to white.
 * Fertilia's baby sports an adhesive bandage on its cheek, but they were not invented until the early 1900s.
 * When Mabel loses the flower in her hair, it reappears on the other side of her head.
 * When the twins travel to opening day of the fishing season in "The Legend of the Gobblewonker," the sign says "Fishing Season," but in the actual episode it said "Fishing Season. Opening Day."
 * In the flashback of the events of "The Legend of the Gobblewonker," Soldier Kid and Pizza Guy are seen, but they did not appear in that episode.
 * In the flashback of the events of "Headhunters," Pizza Guy is wearing a green shirt, but in the actual episode his shirt is red.
 * When Dundgren is talking to Blendin, there is a frame in which his pupil is colored light green instead of black.
 * When Stan laughs at Robbie, his finger leaves the border of the dunk tank.

Fight Fighters

 * In some scenes Robbie has five fingers while in others he has four.
 * When Wendy and Robbie play the game they are moving the joy stick and pressing the buttons, but in the next shot there is nothing happening in the game.
 * When Mabel wins the crackers in the card game, nobody else had any. However, in the next scene, Dipper and Stan both have more crackers.
 * When Stan complains that Mabel doesn't know what game they are playing, Mabel's mouth closes without any animation.
 * When Robbie pushes Dipper down and then walks away, the trash cans and Dipper's hat disappear. They then reappear when Stan comes out.
 * When Robbie leaves the Mystery Shack, his cellphone and amp disappear.
 * When Stan sees the skydiving show, his mouth animation is shown in two places simultaneously for one frame.
 * When Stan falls backwards away from the TV, he trips over the dinosaur skull onto the floor. However, the wall is usually too close to the dinosaur skull for Stan to be able to lie on the floor behind the skull.
 * When Dipper is following the instructions "to unleash ultimate power," he only presses the punch button twice, even though the instructions said to press it three times.
 * When the Fight Fighters game turns off before Rumble comes to life, Dipper's hat turns solid blue.
 * As Dipper and Rumble are walking downtown, a barber shop can be seen in the background. When Rumble swings the pipe, a poultry shop is visible behind him. In the next shot, the barber shop again replaces the poultry shop.
 * After Rumble chases Robbie away, a poster for Robbie's band appears on the tree behind him, even though it wasn't there before.
 * Rumble shoots a blue fireball at Dipper, but in the next shot, it's red.
 * Rumble says that he doesn't have "looking up animation." However, he looked up at Robbie when he was hiding in the water tower.

Little Dipper

 * The Gummy Koala candy bag had a net weight of 5.29, but later, it reads that the net weight is 6.29.
 * When Gideon grabs the contract, the front of it is faced towards Stan. In the next scene, the paper switches to the other side without Gideon moving his hand.
 * Before Dipper started searching information how to grow up in the Journal, he kicks the shelf to get it. While Journal 3 was falling, hand on the book had 5 fingers, instead of 6.
 * When Grunkle Stan knocks the jar of termites out of Gideon's hands, it falls on the porch. When Gideon runs away, it is in the doorway.
 * Dipper grows the pawn while it is on the chess board, but later, it is shown in the background, out-of-place.
 * When Dipper and Mabel are fighting over the flashlight, the caterpillar ran over a couple of cars but when Dipper and Mabel drop the flashlight the cars are gone.
 * The Mystery Shack model is on the left side of Gideon's desk in the beginning. Later, Gideon closes his book and it is on the right side of his desk.
 * The photo of Gideon on his ID card shows him with only four fingers per hand.
 * When Mabel charges into her room, the closet door is open. But when she suspects a wizard made Dipper taller, she looks in the closet and has to open the door even though it was open and not tampered with when she arrived.
 * When Dipper and Mabel tickle Gideon, the pine tree on Dipper's hat is missing.
 * When Gideon puts the jar with Dipper, Mabel and Soos into his breast pocket, the jar disappears.
 * When Mabel was in the bag Gideon put her in gummy koalas it showed Mabel without a headband. Later it came out in the bag.
 * When Gideon was playing with the flashlight before he shrunk the twins, it's hard to notice but it was making the grow sound effect.
 * When Gideon is running away from the termites, he leaves the jar they were in at the shack. However, when he shrunk Dipper and Mabel, he has the jar again.
 * Dipper and Mabel are not visible in the jar when he turns to face his dad.
 * During the flashlight duel, Mabel and Dipper do not flick the crystal, but the beams change.
 * When Mabel and Dipper are playing chess, Mabel moves a black pawn and Dipper says it is not her color (implying her color is white). He then uses a white pawn to take out the black king.
 * When Gideon is on the phone with Stan, he has a brush in his hand. When the scene comes back to Gideon, his brush is gone.
 * When Soos takes off his cap, his hair is brown, but in the mirror his hair is gray.
 * Before Stan places his fez on the dresser, the fez symbol is not reversed in the reflection. When Soos wears it, it is. This may be a clue rather than a goof, as it has also happened in Boss Mabel.
 * In the mirror, Stan's suit reflects normally, but his tie does not.

Summerween

 * When Stan pulls up to the Summerween Superstore, he parks in front of a handicap parking sign. However, the sign is facing away from the parking spot instead of toward it.
 * After Mabel finishes talking about previous Halloween costumes, Dipper eats a candy, and while he is choking, there is a short flash of which Dipper's back part of his hat is not blue; it blends in with the wall behind him.
 * Right after Dipper and Mabel come back from the Summerween Superstore, they are seen on the floor in front of Soos, with many items such as scissors, a pencil, and glue, but when Soos is telling them to be careful, everything disappears. During the time when Soos is telling Dipper and Mabel about the Summerween Trickster, everything reappears.
 * Dipper's watch is nowhere to be seen when he looks at Tambry's party flyer, but when Dipper looks up, his watch reappears.
 * When Mabel opens the door for the Summerween Trickster, Dipper was standing near. However the door never hit Dipper, nor was he there after, but it appears later on.
 * In Mabel and Dipper's music number for Halloween at the biker's house, the treat bag disappears. When he gives them the candy after it ended, it reappears in their hands.
 * During a few frames, the strawberry on Mabel's costume leaned in a different direction.
 * When Soos' truck was recklessly driving through town, it had a blanket draped on the back end of the car. After the car crashed into the store, it disappears.
 * When Soos hits the Summerween Trickster with his truck, Gorney can not be seen. But in the store when Soos is eating out of the Summerween Trickster, Gorney comes out.
 * In the Summerween Superstore, the skulls in the bowls are in different areas from when they first get there and when Soos crashes his truck into the store.
 * Candy says she took a picture of the Summerween Trickster, but she never pulls her phone out when she first met him.
 * Dipper's watch says 6:00 after they meet the trickster, and it is dark. However, that part of Oregon on June 22 would not have a sunset until about 8:50 pm
 * Waddles has a light brown/tan spot on his left eye rather than his right eye.
 * The Summerween Trickster's eyes are peppermints, but after Soos was eating him and he was screaming in pain and fell on the ground his eyes are just yellow dots.
 * When we first see the Trickster's teeth they are white. But they become candy corn after he reveals that he is made of candy.
 * When Dipper is shocked to see Wendy with Robbie, he drops some candy from the bowl on the ground. When Wendy comes into the Mystery Shack with Robbie to get her jacket, no candy is seen on the floor.
 * In the promo for this episode, the Summerween Trickster is bright purple, but in the actual episode, he is dark purple.
 * When the Summerween Trickster is talking about "every discarded bar of chocolate with that white, powdery stuff" he gestures with both hands, even though he only had one free hand.
 * The Summerween Trickster said Dipper, Mabel, Candy, and Grenda had until the last jack-o-melon goes out to get 500 pieces of candy. Yet when the Summerween Trickster came to get his candy, Stan's jack-o-melon was still lit.
 * When the Summerween Trickster first goes into the store for the kids, he tears the door off of Soos' car. When it shows the kids running around behind the Trickster, the car still has the door.
 * Dipper's watch disappears when he first opens the door to the Summerween Trickster then re-appears when Dipper closes the door.S1e12 trick or treating.png
 * Waddles's light brown/tan spot has been replaced with pink spots instead of light brown/tan spots, when he's eating the candy in a bowl.
 * This picture shows many errors in the episode; Gorney is shown in the top left, Waddles in the middle, and Candy and Grenda near the side. This shouldn't be possible, considering Gorney was eaten, Grenda and Candy are with Mabel and Dipper, and Waddles should be at the shack.
 * When the kids are looking up at the roof of the Mystery Shack after the Summerween Trickster is gone, They are standing in a line with Grenda closest to the left of the scene, then Candy, then Dipper, then Mabel. When the scene moves in closer to them, Dipper and Mabel are farther apart and Grenda is standing behind them.
 * When Dipper was wearing his Peanut Butter costume, his birthmark on his forehead isn't visible throughout the entire episode.
 * Right after Dipper comes downstairs, Candy's mouth vanishes.

Boss Mabel

 * When Gompers bleats when a tourist bus pulls up to the Mystery Shack, his mouth does not move.
 * At the end of the episode, when Dipper puts on his cap again his arranged hair changes, but in the next scene, when he is counting money, his hair is arranged again.
 * When Soos is in the Mystery Shack, trying to talk to someone, his Questiony the Question Mark costume is reversed.
 * When Mabel gets something from the vending machine, the bag drops off without her pressing the button. She presses the place where she inserted the money instead.
 * When Mabel is holding the Questiony the Question Mark costume, it is normal. When it shows the costume from the other side, it still looks normal, though it should be reversed.
 * When Dipper took out his fake wolf teeth his hand is up, but in the next scene his hand is down.
 * After Dipper grabs the mace and leaps out the window the window is left open. But in the closeup shot of Wendy, the window is closed.
 * When Dipper is counting the money at the end of the episode, Mabel does not have Stan's hat on. But when Stan comes in and talks to them, she does.
 * When Mabel first enters the gift shop with Soos, Dipper and Wendy, the jar has a red line on it. Later, after Dipper leaves, Mabel draws the red line and claims that they will fill the jar with "one hundred billion dollars".
 * When Mabel is yelling at Soos and Wendy, Wendy's legs are cut off.
 * When Tambry is drinking a can of Pitt cola the scene goes to Mabel then when it goes back her the can is gone and her hair is mirrored.
 * When Mabel stands in front of the mirror wearing Stan's hat, the fez symbol is not reversed in the mirror.
 * In the scene where Mabel cracks down on her employees, Wendy can be seen above the ground with no shoes or legs.
 * When Mabel leans against the gift shop front desk her mouth becomes all peach-colored.

Bottomless Pit!

 * When Sheriff Blubs is telling Stan that there is no Doctor Medicine in Gravity Falls, Stan’s burn mark is replaced with back hair, but it returns moments after.
 * When the bouncer is talking to Dipper, his tattoos are black in the front and back. When the camera goes to the back, the tattoos are colorful. When it goes back to the front, they are all black.
 * When the bouncer talks to the people from the bar, his belt is way up. When he is chasing Dipper, his belt is in a normal place.
 * Despite the fact the the characters come back through the hole, nothing else comes back up.
 * The image at the end of the theme song that shows up for a frame still has Stan's old fez design.
 * When Dipper asks where his spaghetti is, the spaghetti plate has a fork. But when Grunkle Stan spins around, the fork is gone.
 * When Grunkle Stan tries to do a card trick, the Ace of Spades is red instead of black.
 * If the box and shoes were thrown into the pit first, Dipper, Mabel, Soos and Stan shouldn't have caught up with them. They should have always stayed ahead of them.
 * When Stan is asleep, his book is on his stomach. When he is awoken, it has disappeared.
 * When Dipper says "Guys, do you see that?", his sneakers are completly black instead of having their usual white sole.

The Deep End

 * Soos doesn't have his towel when Stan was talking about the perfect lawn chair.
 * Also, when Stan starts talking about the chair, another chair is behind Soos. It then disappears, never to reappear again.
 * When the ship found Mermando, there is nothing behind Earl. But in the next scene, a mountain appears behind him.
 * One water balloon fired off the screen was blue. However, when it hit the cooler, the balloon was red.
 * In the shot where Mr. Poolcheck is telling everyone that the Pool's closing, Gideon can be seen relaxing on a lawn chair that doesn't have a tree hanging over it.
 * At some points in the episode, Mermando's mustache hairs switch places on his face, and the number of them change from three to four quite often as well.
 * Stan's watch reads the same time upon entry and exit of the pool jail, despite being in there for two hours.
 * Every time Dipper gave Mermando reverse CPR, the bottle refilled with water, even when it was empty before.
 * The first time Mermando plays his guitar, he seems to be left-handed. But the second time, during the night, he plays it as if he was right-handed.
 * When Mermando's bottles for Mabel jump out of the water, the word "Mabel" turns to "Lebam" which is Mabel backwards. They then turn back to Mabel.

Carpet Diem

 * Mabel's eyebrows are gone until the scene of her brushing her hair with her hand.
 * Dipper's teeth are missing in a frame.
 * When Dipper realizes that Mabel is having a sleepover, you can see that there are sleeping bags for Candy and Grenda already in the room. When they enter the room, they are holding sleeping bags.
 * Candy broke the Eiffel Tower for the miniature golf course when she fell, not Grenda.
 * After Mabel offers Dipper the pizza, the glitter disappears. In the next scene, the whole slice disappears as well.
 * In some scenes, Dipper's (in Mabel's body) and Mabel's (in his body) eyelashes are missing.
 * For a split second, when Dipper and Mabel are walking through the room, Mabel's blush pink spots gain black lines.
 * Before Dipper reads "Experiment 78" the tag with that sentence is on the center of the carpet, as he reads it the tag is on the border. But in the close-up of the tag with electricity around it the tag is on the center again. Later as Dipper reads all the entire tag it was on the border again.
 * For a split second, when Dipper (in Mabel's body) was screaming while looking at the mirror, one of his eyebrows disappear.
 * When the twins are discussing about the body swap, their reflections are not seen in the mirror.
 * When Dipper (in Mabel's body) enters the kitchen to first give Stan the rock sandwich, the cereal box is missing until he pours it over himself.
 * When Grenda puts lipstick on Mabel (in Dipper's body), she puts it around the lips. But when she and Candy finish put make-up on her and when Mabel and Dipper swap bodies the lipstick is all over the lips. The lipstick also changes size and lining.
 * When Dipper (in Deputy Durland's body) and Mabel are fighting, Dipper makes a sound but Keith Ferguson (Deputy Durland) is heard instead.
 * Soos wasn't seen biting part of the door until the close-up of him is showing.
 * The arrows on the Electron Carpet switch from counter-clockwise to clockwise at some points.
 * When Waddles (in Soos' body) is eating the tissues, a tissue is seen on the corner of the table. Then when Grunkle Stan calls him the tissue disappears.
 * Throughout the episode, whenever it's showing Waddles (in Soos's body) its lacrimals are light purple rather than white.
 * When Old Man McGucket corners Soos (in Waddles's body), the puddle of mud disappears.
 * Before Candy says "Boys make me think about kissing!", the pillow Grenda throws at her is pink, but when Grenda does throw the pillow, it's green.
 * When Dipper first lies down outside, he is far from the totem pole. In the next shot, Dipper's pillow is up against the totem pole.
 * When Dipper says that the carpet switches minds, his eyebrows are gone.
 * When Mabel and Dipper are tackling each other in their room, the mini Eiffel Tower that Grenda broke at the beginning of the episode is perfectly fine.
 * When Dipper first enter the room he read the back of the carpet's tag which says "Experiment 78." After switching bodies the back of the tag says "Electron Carpet."
 * When Dipper and Mabel are arguing and tackling each other at one point the inside on Dipper's hat is black but in the next shot it turns back to blue.
 * When Dipper is in Mabel's body, the usual bags under his eyes have found their way over to Mabel's face. However, at many times in the episode, Mabel (in Dipper's body) has the same bags under her/his eyes before the switch.

Boyz Crazy

 * The radio Robbie plays his CD on disappears but reappears in the next scene.
 * For a second, the symbol on one of the Pitt Cola cans is incorrect.
 * When Stan turns to tell Dipper a story about music the design on his fez is different for a split second.
 * When Stan wants to hear about why Dipper is pacing, he pulls a chair in front of the crate of Beef Cans, but when it zooms on Dipper, he is sitting farther to the side and in front of the trashcan and table with bones. Later he appears back to the original spot.
 * When the camera zooms in after Stan puts the CD in the record machine then out again Stan appears to be on the same side of the table as Dipper but earlier they were on opposite sides.
 * The music producer steps on a flower Soos was watering. Later, when the goat is eating his license plate, the flower disappears.
 * When Mabel is blocking the door her headband is gone, then from the back of her head it appears again.
 * There is a part in which Grenda is shown without any lip-gloss on her lips, but then some lip-gloss appears on her lips.
 * When Wendy wears a coat, she zips up it, but in next scene it is unzipped.
 * When Grunkle Stan threatens to rewind Robbie's face, the speed is at 16.5. But when Dipper rewinds the record, the speed is just above 45.
 * When Candy, Grenda and Mabel find the boys inside the cage, there is a frame in which Candy's skirt disappears.
 * In the introductory shot of Thistle Downe, the shot wasn't cropped properly, so the edge of the Pitt Cola poster ends off oddly.
 * When Grenda says "It's Grenda time" and kisses the poster she still has the lipstick, but the eyeshadow is gone.
 * When Mabel came to apologize to Grenda and Candy, in one frame her mouth disappears.
 * When Dipper first walks into the kitchen the only chair there is the one holding up a box of The Brown Meat. But when Stan invites Dipper to tell him his problem, another chair appears for Dipper to sit on.
 * When Dipper and Stan go to Lookout Point, Stan has his less formal attire on. However when they are in the Stanley Mobile, he has his usual outfit on.
 * The money symbol on Bratzman's hood, changes to something that resembles an upside down number five.
 * When Mabel, Candy, and Grenda are heading towards the dressing room, a crate in the foreground is clearly unfinished.
 * Sev'ral Timez shouted "2013" as an joke about how "some musicians will randomly shout the year at the end of their performance or verse." However Gravity Falls takes place in 2012.

Land Before Swine

 * Up until the tourists realize Stan is ripping them off the children aren't holding anything. But once they do it cuts to them throwing down souvenirs before leaving.
 * When Soos picks up the yarn in the abandoned mines, it ends by Mabel's feet. In the next scene, Soos is wrapping around a large ball.
 * Stan originally straps Waddles to his back, but when he appears punching the pterodactyl, Waddles is strapped to his front.
 * Stan's clothing was torn from his fall and battle with the pterodactyl. However, his clothing is undamaged when they leave the abandoned church.
 * Mabel had her backpack on all the way up to Old Man McGucket getting eaten. It cuts to what Stan and Waddles are up to, and when it returns to Mabel, Dipper, and Soos, she no longer has it.
 * When the pterodactyl is charging at Stan from the air the Huggy Wuvvy Tummy Bundle is nowhere to be seen.
 * After Stan jumps off the pterodactyl and climbs up the edge of the cliff he has wounds on both sides of his chin, but when he turns to talk Mabel he only has a wound on the right side.
 * In the credits, Stan says he has 4 aces. This is impossible since only one other ace was on the table.
 * At the very beginning when Deputy Durland is playing Cap'n Brain-Teasers' Fun Maze one of the shark's teeth are golden.
 * Waddles is shown eating a piece of Stan's pant leg. One frame later it literally disappears from his mouth.
 * Mabel takes a selfie using a camera in one hand with Waddles and after when she is looking at the photo, both her arms are crossed.
 * When running from the pterodactyl, there is a frame where Stan has two mouths.

Dreamscaperers

 * When Bill is about to finish off Mabel and Soos, Mabel's skin that was supposed to be green changes to her normal skin color.
 * The candles around the sleeping Stan disappear when the gang leaves his mind.
 * The hat on sleeping Stan's head disappears when the gang leaves his mind.
 * When Gideon was on his walkie-talkie, Soos, Dipper, Mabel, and Stan were inside. A few shots later, they are suddenly outside the shack.
 * When the memory of the combination falls into the Bottomless Pit, initially Stan is not holding a cane. When it cuts back to him he's holding a cane, although it's not his usual cane.
 * In the memory of Stan entering the secret room there are boxes on top of the vending machine, which are not seen in that episode. (Although this memory may be of another time Stan entered the room.)
 * The code Stan used to enter the secret room is different from the one in "Tourist Trapped." (Although this memory may be of another time Stan entered the room, and had changed the combination at some point.)
 * In the memory of Stan explaining to Soos what he thinks of Dipper, part-way through the explanation, Dipper curls his hand around the edge of the door and into the memory, but later he has the push the space in between Stan's mind and the memory to move into it.
 * In the memory of Stan that Dipper enters, when he first enters it Soos's T-shirt is the same color as his skin.
 * In the memory of Stan's date with Susan, they're eating dinner and a set of food is placed in front of them. After Stan throws his plate onto the ground, as Mabel is about to close the memory's door, the table is clear of everything.
 * When the gang leaves Stan's mind, Mabel and Dipper's hair are a shade or so darker than normal.

Gideon Rises

 * When Gideon first jumps through the paper-covered hoop, he is wearing the mystic amulet that was destroyed in "The Hand That Rocks the Mabel." In the next shot he is back to his normal white necktie.
 * When Gideon unveils the Gideon Land model his white neck tie is green. It then goes back to white when it shows him with the Gideon Popsicle behind the Gideon Land model.
 * When Tambry appears in the crowd at Gideon's unveiling, her hair is flipped left to right.
 * When Wendy mounts her bike, the outline around Dipper's right eye is briefly miscolored.
 * In "Little Dipper," the maze page is the page before the height altering crystals one. In "Gideon Rises," the Gremloblin page is before it.
 * The orientation of Gideon's face on his pins is shown wrong twice. Once when Shandra Jimenez is interviewing Gideon and again when Stan reveals that they are cameras.
 * When Dipper yells after getting hit by Mabel's misfire of her grappling hook, his mouth remains closed.
 * When Gideon first gets Journal 3, and picks it up, the thumb occasionally disappears.
 * At the end credits, the TRUST NO ONE page is on the wrong side of the book, as in "Tourist Trapped" it's on the left, not the right.
 * In the scene when the Mystery Shack is being repaired, Mabel's usual pink shooting star sweater is purple.
 * Just before Gideon commands the gnomes to take the twins away his usual white tie changed to green.
 * When Gideon is explaining the journals to his father; the mysterious man is burying the journal where Dipper found 3, but the mysterious man is burying 2 which is supposed to be 3.
 * At the exact moment Gideon says "subdue them!" to the twins, his right foot is split in two.
 * When Gideon asks Old Man McGucket if the Gideon-bot is completed he has 2 and 3. However, when he enters it, the books are gone. Later, when Dipper and Mabel defeat him, 3 is revealed in the robot, as Dipper found it in the rubble, and Gideon held 2 in his clothes.
 * In the newspaper at the end, in the photo of Gideon behind bars, he has 4 fingers on each hand instead of 5.
 * Robbie can be seen in the crowd cheering for Gideon, however in the next scene he can be seen coming out of the woods chasing Wendy.
 * Also, in the crowd scene he had his Gideon pin, while in the next scene he does not.
 * At the end of the episode when Mabel is trying to cheer up Dipper there is a green suitcase next to her, but when she gets off her bed it disappears.
 * Although Shmebulock nodded yes when Jeff asked him if "Shmebulock" was the only word he could say, it isn't, because in "Tourist Trapped" he said "Queen" with the other gnomes.
 * Near the end of the episode when Dipper is first shown unpacking, the perspective of his suitcase is wrong and laid over partially on a boxes of crates in the background. In the next shot it's correct.
 * Adjusting the contrast on one view of the Universe Portal reveals a colorless black dot to the right of the machine.
 * Near the end there is a pan-down of a cross section of the building. We pan down from the twin's room, with their window facing out to the night sky. Directly below it is the gift shop, seen in a view facing the vending machine, toward the building's interior. This is an impossible mutual orientation for the two rooms.
 * When Gideon tells the two bodyguards to get rid of the Pines family during his announcement of Gideonland, the tattoos on the Skull Fracture Bouncer disappear for a few frames as he grabs Mabel.

Candy Monster

 * The number of golf clubs Dipper has changes, he had three when he tried to trap the creature and had six near the end.

Stan's Tattoo

 * Dipper says that Stan never takes off his under shirt, but he takes it off twice in "Dipper vs. Manliness" and nobody noticed anything.

Mailbox

 * Soos's hair is shown to be a lighter shade of brown, and shown longer than it normally is.

Lefty
None

Tooth
None

The Hide-Behind
None

Mabel's Guide to Dating

 * When Mabel says: "Love is all around us" before she was attacked by the squirrels, one of her fingers is not outlined.

Mabel's Guide to Stickers

 * The please sticker on the cash register is not colored.

Mabel's Guide to Fashion

 * When  Candy  and Mabel are drawing on each other's faces, Candy's normally dark purple-gray hair is completely black.

Mabel's Guide to Color

 * When Grenda pulls out a jug of expired milk, Candy is drawing a picture, and Grenda finishes the milk before the picture fills the screen, but after it is zoomed out, Grenda is seen finishing off the last few gulps of milk.
 * When Dipper and Candy are setting up the mirror, Dipper's nose is the same color as the rest of his face.
 * The window through which Stan sees the rainbow has never been seen in his office before and doesn't seem possible to be facing outside.
 * Dipper's socks are completely white instead of his usual socks with a gray area around his toes
 * Despite reading a hard bound book on his bed, Dipper is able to easily crumple the cover as Mabel laughs

Mabel's Guide to Art

 * In the last few seconds of the short, when Mabel is being attacked by cats, her braces are missing.

Fixin' It with Soos: Golf Cart

 * When Soos goes to fix the golf cart's inside it is totally repaired.
 * When the golf cart successfully jumps Stan's car, "STNLYMBL" on the car license plate is mirrored.

Fixin' It with Soos: Cuckoo Clock
None

TV Shorts 1

 * During the disclaimer at the end of the Mystery Shack commercial, the statement reads: "In the even of no tip, you will be escorted from the premises." "Event" is misspelled.

TV Shorts 2
None

Mabel's Scrapbook: Heist Movie

 * Mabel slushies herself up then climbs on the wall to open the outdoor vent however there is no slush on her hand when she opens it.
 * In the projection room, Mabel is eating a bag of Nyumalums. But after she gets up to tell her joke and sits back down, the bag is gone.
 * In the first wide shot outside the theater, the poster for Grandpa the Kid Again is on the far left, next to the one for Horse Dad. However, in all the rest of the shots it is on the far right, next to the one for Monkey Business.
 * In the audience, there are two "unnamed girl in pink" in the audience.
 * When Tambry appears in the audience, her pink highlight is on the wrong side.

Mabel's Scrapbook: Petting Zoo

 * Mabel said she doesn't have any pictures of the gnomes in "The Legend of the Gobblewonker," but a picture of a gnome is shown in Mabel's album.