Continuity mistake: In a major fight scene two soldiers on opposite sides are jumping and spinning and tapping each other on the head with their swords.
Continuity mistake: The pictures of Sara's parents in the locket switch places throughout the movie.
Continuity mistake: Near the beginning of the film, Keanu Reeves gives Victoria a fake wedding ring from one of the chocolates. Previously, you can see that he is wearing his real one. When he puts another ring from the chocolate on his own finger, his original one is gone.
Continuity mistake: During the heist, a police officer fires eight shots from a revolver which only holds six bullets, and he doesn't reload.
Continuity mistake: When Po is killed by the NVA it is the middle of the night, Captains Cahill and Doyle are close enough to the village to hear the shots and rush back to the village but as they enter the village it is early dawn.
Continuity mistake: Towards the end, as Rob Roy is negotiating the duel, watch his hands - they switch from his sides to in front of him 2 or 3 times in different shots.
Continuity mistake: In Morocco, when Lee, Capby, and Roberts take off, they still have their external fuel tanks under their wings, indicating they have not entered combat. As they are flying and do their mission, they have dropped their tanks. But after Lee says "let's head for home," you see one Mustang landing, external tanks and all.