Continuity mistake: While at the pool hall, Mary indicates that the sign in the window describes Larry perfectly. A close-up shows it reads 'Out To Lunch', but the next wide shot shows it reads 'We're Closed'. (01:01:45)
Continuity mistake: When Bond is flying over China and landing on the sea by the Scaramanga's island you can see that his plane has two floats - one on either wing. But in the shot where he is heading for the beach it is clearly seen that the left float has gone! (01:28:40 - 01:30:55)
Revealing mistake: When Adams is inside the trench and dirt begins to pour, he is replaced by an obvious stuntman with a totally different hairstyle.
Continuity mistake: The light outside the building as seen from the dining hall is dusk, but from the outside it's pitch dark. This swaps back and forth all the time.