Revealing mistake: When Bond throws a Blofeld henchman off a cliff near Piz Gloria in the Alps, you can see that it is a dummy, as its arm swings round and wraps around the whole dummy.
Revealing mistake: In the scene where the town is collapsing, there is a shot of Ben in the bathtub falling into the river, if you look closely, you can see the strings that are keeping the tub steady and upright.