Continuity mistake: When James Bond is fighting underwater with an opponent, the opponent rips off James' diving mask (which is blue). Then, James rips another mask off another opponent who is lying dead on the ocean floor. This dead opponent's mask is black. James puts on the black mask, and then he turns around, and the mask is blue again. (01:57:10)
Continuity mistake: In the scene where Col. Hessler is visited by a courtesan, he refuses her "services", opens the door and hands her her fur coat. In the next shot, the door is closed again and the colonel still has the courtesan's fur coat. (00:42:50)
Revealing mistake: In the final shot of the film the model makers neglected to include the antenna at the top of the Eiffel Tower, seen previously on the real tower in the establishing shot of Paris. (02:31:20 - 02:37:10)