Audio problem: When the riot breaks out the prisoners grab a guard who has a shotgun and start fighting with him. You hear a gun shot but the guard holding the shotgun doesn't even have his hands anywhere near the trigger.
Audio problem: When Sophie hits Gripper Burke with a French stick during the food fight at the end of the movie, you can hear Sophie's voice but her mouth is not moving.
Audio problem: After the scene with the white dude visiting Sanford to look for cotton, we see the reverend being greeted by a bunch of people playing billiards. There's a marked discontinuity even in the audio played as he walks forward to a hi-five, not to mention that nobody had the cue anywhere near the green carpet but still you see in the second shot that balls are rolling. (00:46:00)
Audio problem: During the night scene at the camp, Bernard Bresslaw says something to a native before putting something in the cooking pot. You can see Bresslaw's mouth moving after he has finished speaking.