Continuity mistake: When Alec Baldwin goes to visit Medgar Ever's brother at his radio station, the brother pours Alec a mug full of Coca-Cola. Alec sets this mug down and never touches it. They show one wide shot of Alec, and there is a double pen holder in front of the cup, the pen on our right side overlaps part of the cup, while the pen on the left side is not near the cup. Later we see another wide shot of Alec, and now the cup is in the same position, and the camera is from the same angle, but the left pen overlaps the cup instead of the right pen.
Visible crew/equipment: In the final scene of the film where Whoopi Goldberg as Merlie Evers is addressing the press, it is a tense and emotional scene. However, director Rob Reiner obviously had little or no control over his extras, as one idiot is clearly shown grinning into the camera.