Continuity mistake: In the first shots of the golf course, you see Goldfinger's Rolls parked to the far left of the main building, with Bond's car in the lot in the background. When the scene changes to the inside of the clubhouse store, the Rolls is now very close to the front of the store. At the end of the golf game the Rolls is back to the left of the main building and as the camera pans back you can see that the store is to the far right of the main building.
Continuity mistake: The T-Bird following Oddjob to the junkyard does not have fender skirts but does when they give up the chase and head back to the farm. (01:16:25 - 01:20:30)
Other mistake: In the plane when Bond fights Goldfinger, one of the henchmen is partially visible behind Goldfinger when he appears from behind the curtain. When the fight starts, the henchman's arm is also visible. When the fight is over and just before Bond moves to the cockpit, the henchman is lying on the floor with no explanation for why he was not sucked from the plane like Goldfinger.
Continuity mistake: When Bond is first put in the truck, it shows both of the larger trucks as 1964 Internationals, lead by a new Jeep CJ series with curved front fenders. In the next few shots, the Jeep becomes a 1950s version with flat front fenders, and the larger trucks are now darker green 1956 Fords. When they arrive at Fort Knox, the Jeep and trucks have changed back to the newer models.
Factual error: When Oddjob has the Lincoln crushed at the junkyard, it is smashed into a small rectangle, and dropped into the little falcon pickup. Even though the crushed car fits into the bed of the Falcon, it still weighs at least 2 tons. That weight would have dropped the back of the truck to the ground, but the truck doesn't even squat a few inches, let alone being able to handle that load with the tyres it has. (01:16:55)
Continuity mistake: The bomb is disarmed with 007 seconds left on the conveniently placed timer with big white numbers. Then, Bond says "Three more ticks and Mr. Goldfinger would've hit the jackpot." What? Well, originally, the timer would've stopped at 003, and the line would make sense, but later the powers that be decided to stop it at 007 instead for a good old Bond joke, and apparently never forgot to delete that line in editing. [The 3 clicks mistake is an interesting one as there are still in existence cuts of the film with the original 003 on the nuclear device timer. One contributor saw the 003 version in 1970 and was puzzled when the 007 version turned up on TV years later.] (01:40:40)
Factual error: It is impossible for Oddjob to have crushed the golf ball with his hand no matter how strong he is. For the way he crushed in his hand enclosed completly around it. It is impossible to crush even an egg that way unless you apply pressure all around. To his credit, Sean Connery wasn't blind to this. He repeatedly complained about this when he first read the script, that the golf ball scene was ridiculous.
Continuity mistake: You can see when the black Lincoln that Oddjob drives to the junkyard is lifted to be crushed, it has no engine or transmission. (01:15:40)
Other mistake: The crushed 'cube' car is not the whole Lincoln; that kind of small cube is produced in junkyards from the body only, without wheels, drive train, etc.
Character mistake: When Bond is being flown to Baltimore, Pussy calls her assistant Mai Lee twice on the plane. Once in person, then telling the co-pilot to give her instructions. However, when they disembark, she calls her Mai Lai.