Revealing mistake: When the small jet taking Bond to Washington is shown taxiing away from the assembled VIP the engines are not running (no exhaust) and one can faintly see a tow cable pulling the plane to the right.
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.
Factual error: When Bond goes to open the "nuclear device" he picks up 2 solid gold bars and proceeds to use them to open the casing. Due to the density of gold, it is virtually impossible for a person to lift even a single bar without the use of two hands. Let alone one in each hand, using them to open a box. Regarding the same scene, there was no damage to the gold. Gold being the softest of metals, it should have shown severe damage if used in that manner.
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: The complex in Switzerland (Auric Enterprises) when seen from the hills beyond is a few widely spaced buildings of sheet metal construction. After nightfall when Bond goes down to investigate, the site has turned into a veritable city of closely spaced buildings of brick construction.
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.