Continuity mistake: When Tracy is running away from the police, there is a shot of her pushing through the crowd until she is free, but the next bird's-eye shot shows her pushing through the marchers all over again.
Factual error: The movie is set in 1962, but when Tracy misses her bus, she catches a ride on an International-Harvester truck that wasn't introduced until 1969.
Continuity mistake: In the scene where Tracy first goes to detention and meets Seaweed, when Seaweed says, "Well this is something for you," and then he introduces himself, look on the floor behind him. You can see crinkled up paper balls on the floor that throughout the entire scene move spots, and you never see anybody pick all of them up. For example, watch when Seaweed is dancing and his foot touchs a ball and it gets tossed aside and magically disappears.
Continuity mistake: In the scene where Inez is singing in "Run and tell that", Links arms is going from being crossed to hanging down between the shots.
Continuity mistake: When Seaweed sings "Run and Tell That", he is singing to Penny, "And then there's those who try to help God knows." When the camera is facing her, Penny is shown looking very stiff, as if she wasn't dancing (or couldn't get into the groove). When the camera is over her shoulder, showing Seaweed, she is dancing. The next shot of Penny she is not dancing again.
Continuity mistake: When Tracy stops to sing at the music store, the lights are on and people are inside. In the next shot, when Tracy runs across the street, the store is dark.
Continuity mistake: At the end of 'Run and Tell That' you see Penny begin to get off the bus first. Next shot, you see Tracy stand up to get out with Penny behind her. In the next shot, Penny is off the bus first again with Tracy behind her.