- During the scene where Peter says "There has got to be an explanation for all this", the background is reversed from its usual position.
- During the cutaway gag featuring the Franks hiding from the Nazis, in the opening shot, there is a blonde girl. When the shot switches to them staring at Peter in horror, her hair is brown. Also in the same scene, both of the men's mustaches vanish when they see Peter eating his chips loudly.
- After Chris comes downstairs in his PJ's, there are some shots with him wearing black and blue slippers and others in his sneakers.
- When Meg runs down the stairs with blood on her hands, the carpet changes from its usual yellow to blue.
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