Board Thread:General Discussion/@comment-25548156-20130814194325/@comment-1674355-20140213163430

One more thing on the reflection of the fez being just a production error. The "Boss Mabel" is the last time we see that particular fez symbol. The reflection mismatch might have some plot significance, especially if the change is supernatural. It changed on the bobble-heads, on Wax Stan, and even in Book 2. There's another old document around with the symbol in the old form (seen only in the end credits single-frame image, and among the "lots of things" that Bill knows).