Revealing mistake: At the end, when Bond is chasing Blofeld, there is a shot of him hanging onto the edge of a cliff. There is a bit of snow moving up towards him, meaning that this shot is played backwards.
Continuity mistake: In the opening scene Tracy overtakes Bond's car on his left side. However, Bond's mirror shows Tracy passing on his right side.
Audio problem: During the car chase with Tracy, after hooking up in Switzerland, she speaks while driving yet her mouth, while open, doesn't move.
Other mistake: In the bobsleigh chase, when a grenade rolls around Blofeld's feet the rear projection FX suddenly swaps from showing a tunnel to showing a landscape going wildly in circles, as if the bobsleigh had crashed. However, on the following shot the bobsleigh is sliding along the tunnel normally and the rear projection plays the tunnel projection as if nothing had happened.
Continuity mistake: At the casino Bond deals cards to a man on the left. This man's left arm swaps between raised to lowered depending on the shot.
Continuity mistake: After the bobsleigh chase Bond falls on the snow and a dog approaches. The amount of snow on Bond's coat suddenly decreases between shots.
Continuity mistake: During the ski chase it starts off with Blofield and five henchmen, after one gets killed by the snow plough they stop and there are now six henchmen when there should be four. Through out the chase all of the long shots only show six in total.
Other mistake: During the stock car race towards the end, the henchmen sitting in the front right of the Mercedes starts shooting out of the window. He shoots forwards, but Bond is on his left with a white Ford Escort in between them. He somehow manages to hit Bond's car - we see it and hear a ricochet. He shoots several times but always directly in front of him. Bond's car is always on the left, continuous scene.
Answer: It's an entirely intentional aside to the audience, the one occasion in the entire Bond series where the so-called 'fourth wall' (i.e. the cinema screen itself) is broken. As such, within the context of the film itself, it doesn't really have much of a meaning.
Tailkinker ★