Continuity mistake: Gene Hackman and John Shea are both doused with water when they come out of the restroom. In the next shot, their hair is completely dry.
Continuity mistake: Burt is lying at the bank with broken leg flesh dangling. Next shot different angle, not dangling, then dangling again.
Continuity mistake: Fiona Fullerton's eyebrows change from full to plucked and back again all through the film.
Continuity mistake: When Tintin and the two kids are escaping from the submarine lair, the water level keeps changing. It's supposed to be more and more high, but it's lower in some shots.
Continuity mistake: When Snoopy and Woodstock lie down after finishing their meal at the camp, you can see there is still food on both their plates, but in the next shot the food has disappeared.
Continuity mistake: When the soldier finds the other soldier dead, having been hanged from a tree by Indians, he panics and flees. Between shots the halberd weapon he was holding vanishes. (00:22:59)