Continuity mistake: In the scene where the angry people throw rocks through a painting of a naked woman on a store window, the first rock smashes right through the womans face. In the next two scenes, more rocks are thrown, but the womans face is again visible, and the first hole is above where it should be.
Continuity mistake: In the scene in the gym where Skip misses the basket, you see a close shot of the coach standing still and putting his arm in front of one of the players to stop the kid from touching the rolling ball. It then cuts to a far shot, and you can see the coach walking, not near any of the players.
Continuity mistake: Bud goes into the kitchen, and sees Betty when she has turned color. When she is seen from the back, her hair is still in black and white. When you see her colored face, her hair is brown. Once she is made up to be black and white again, her hair is once again without color.