Factual error: You can see the 3 point line painted out on the basketball court, they never had 3 point lines in the 50s. (00:21:55)
Continuity mistake: When the brother and sister are arguing, it is supposedly 6:30. because that is when the marathon starts. But watch when he flips past the preview channel - it is showing shows for the 1 to 2:30 slot. (00:00:35 - 00:12:40)
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. (01:26:30)
Audio problem: When Bud is yelling at his sister in the school hallway by her locker, she complains about girls not being happy in poodle skirts and sweater sets. When the camera's point of view switches, her mouth is still moving even though she's stopped talking. (00:37:00)
Continuity mistake: Just before the scene where the mob smashes the window we see a shot of the sky, which is in colour, the clouds are pink with blue sky, yet every other shot with the sky in the background in the following scene the sky is once again black and white.
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. (00:24:20)
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.