Other mistake: When Jack first arrives in Christmas Land he doesn't know what is falling from the sky (snow) but he somehow knows that the children are throwing snowballs.
Continuity mistake: One of the tiles comes loose when Wallace is walking across the ceiling in the museum. A few seconds later, the tile is flat against the wall again.
Other mistake: In the scene where Andrea is being sucked into the fan at the Gotham worlds fair, Batman rides in on his motorcycle. He turns into the fan to rescue her, but his cape is flapping in the opposite direction in which the fans are sucking.
Continuity mistake: When Bob tells Junior that Larry is a cucumber, the carpet and the shadow of Junior's bed shift to the right a little bit.