Continuity mistake: After Bond saved Tracy from drowning (at the start of the movie), he is fighting with the two men of Blofeld. In the first shot they're standing about 5 feet from the waterline (on the beach), in the next shot they're waist deep in the ocean.
Continuity mistake: When Blofeld gets thrown from the bob-sleigh and gets his neck caught between the branches of a tree, he is caught under his arms in the long distance shot.
Paul Bessant
Other mistake: In the scene when the helicopters arrive over the research center, look at the heli in the bottom right - it just fades out, while one on the left materialises, and the one in the middle changes position. Notice that after all the helicopters have changed place, you can see the helicopter that faded out appear on the helipad (02:25:25)
