When Louise throws Richie in the bath tub to transform him back from a dog into a human, he is no longer wearing an apron.
When Louise wishes David to leave her alone and the car swerves into oncoming traffic the cars change and disappear in different angles.
In the scene where Louise's purse is knocked off the desk in the classroom; her teacher picks it up revealing the top of the set. A vast area of blackness reveals the sound stage.
During the song "Top That," the audio and video are slightly out of synch. Other songs have the same problem, but the audio/video mismatch can really be noticed during TOP THAT.
When Louise is outside cheer leading, she is called over by 3 girls, one of which is Kiki who broke her leg 2 scenes prior.