Continuity mistake: At the beginning of the "Guilty As Charged" musical number, Tim Meadows' facial expression changes. His lips are pursed in the wide shot but not in the close-up.
Continuity mistake: As Dewey's parents are dancing to Dewey's song on the radio, take notice that Dewey's mother gets her foot wrapped up in the electrical cord of the radio and falls out the upstairs window. Upon her hitting the ground, you should be able to see that there is no cord wrapped around either foot, or a cord that leads back up to the window. However, the radio's electrical cord comes out of the wall socket anyway as if it was still attached to her foot, causing the radio to go on the same journey as she did. (00:30:00 - 00:30:35)