Continuity mistake: Before the napalm attack as Colonel Kilgore gives Lance a pair of shorts to wear while he's surfing, there is yellow smoke visible on the beach between them and the other side of the bay. As the jets fly by and this spot is again visible the yellow smoke canister is not there. (00:48:35)????
Continuity mistake: Harrison Ford lights up his cigarette and Captain Willard says, "I'm not presently disposed to discuss those operations sir." Jerry is sitting with his back almost up against the wall. In the next shot as he takes a puff from his cigarette he's moved and is now leaning forward. (00:10:45)????
Other mistake: When Chief Phillips tries to kill Captain Willard there's a shot of the captain's back in the bright sunlight. If you look closely at the center of his back below his right shoulder there's a pressure mark similar to what you see on a hot summer day after a person gets up from sitting in a beach chair for a while. On the PBR we see Martin Sheen's character standing for a long time throughout the entire scene, but he was definitely sitting for a while before this particular shot was filmed. The pressure mark is not in the previous shot. (02:23:20)????
Continuity mistake: Captain Willard and his two escorts get out of a helicopter and walk up to the guard post on the way to see General Corman. The soldier in the front is carrying some yellow papers in his right hand. In the next shot as they pass the guard the papers are in his left hand. (00:09:40)????
Revealing mistake: As Captain Willard takes his second swing at Colonel Kurtz there is a "spark" superimposed against the wall behind his head, which is to depict the contact point of the blade to the wall. However, the blade is actually resting on the Colonel's back, nearly a foot away at that time. (03:07:45)????
Continuity mistake: Roxanne prepares a pipe for Captain Willard and says, "It was the morphine he took for the wounds he suffered in his heart." The shadow of her left hand falls on her face as she holds the needle over the flame. In the next shot, however, the lighting has changed and the shadow is now nowhere near her face. (02:16:40)????