Continuity mistake: The father tears the children's advert for a nanny up into 8 pieces, but when it comes out of the chimney it's in far more bits.
Continuity mistake: When Rudolph and Hermey sing the Misfit song and they are crossing the wood log across the crack, at first the shot is under Hermey and it shows Hermey crossing half of the log. When the shot comes above Hermey, he is once again where he started. (00:23:25)
Continuity mistake: Pushed by Mr. Kenton in the guise of a mule, Harold falls with his back against the sarcophagus. He is positioned in different spots between cuts. (01:06:40)
Continuity mistake: When the clerk looks in close-up at the bank cheque written in disappearing ink by Fantomas, the background has nothing to do with the desk, and the distance is all wrong as well. (00:03:10)