Revealing mistake: When Jim is riding the bicycle through the empty hospital, the "Frigidaires" begin falling through the roof. One bursts open, dropping its contents onto the floor. Something from inside must have landed on the camera because you can see it jerk suddenly.
Continuity mistake: As the family is piling into their car to go to the costume party, Jim, who is carrying a large, balsa sailplane, accidentally snaps the tail and it falls sideways. In subsequent shots the tail is upright.
Continuity mistake: When Jim finally recognizes his mom, he hugs her with his arms outside hers. In the following shot from behind Jim, his arms are under his mom's.
Continuity mistake: As the internees begin the long march they leave through an arched gateway. A bonfire burning outside the gates changes sides from one shot to another.
Continuity mistake: When Jamie is about to steal the soap, he places the boots on a plank right next to a beam. In the next shots the beam is much further away.