Continuity mistake: When entering Fort Knox we see the laser cutting from left to right across the metal door, which is subsequently pulled out. But when we see the door from the inside, it looks as if the laser has cut also both sides. There was no time for that - and we do not see the laser make such movements as going up or down.Jacob La Cour
Deliberate mistake: When Bond is getting chased by Goldfinger's gangsters, he sees a car's headlights coming straight at him (which is later revealed as a mirror reflecting his own headlights). To save his life, he crashes into a nearby wall. In some versions of the movie, his car only goes in part way, while in older versions, his car goes all the way through the wall. The filmmakers must have changed this so the scene following that, which has Oddjob opening the door and revealing Bond unconscious, could work.
Continuity mistake: In the opening sequence, Bond sets some explosives, then checks his watch. A closeup shot shows he wears the watch on the outside of his black long-sleeve outfit. He rushes outside, and the following shot he peels off the top to reveal a white smoking jacket. But he never removes the watch first, as it is now *inside* his jacket sleeve.
Continuity mistake: When Bond and Tilly Masterson stop at the garage after her car is ruined by the Aston, we see her wooden case on the rear parcel shelf of the DB5. She gets out and so does Bond, yet when he reaches in to give her back the case he only just reaches in with his arm. There is no way he could reach the case.
Deliberate mistake: Goldfinger has imprisoned Bond in a jail cell guarded by an Asian. Bond draws the Asian into the cell by smiling through the small barred prison door window and then slowly sinking out of sight. When the Asian enters the cell, Bond drops on him from above. While it is physically possible for Bond to work his way up the walls into that position, he could not do it in the time elapsed nor could he do it without passing his body in front of the small barred window (which would be seen by the Asian guard).
Revealing mistake: At the beginning of the film, Bond shoots his rope gun to climb over the wall. If you look closely, the rope he shot didn't even come out of his gun. It comes from off the left side of the screen. Very visible in slo-mo, or paused