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.
Other mistake: Labiche uses binoculars to view the coupling of the armament train from the control tower (when they are deliberately delaying train coupling), but the binoculars are in the closed/stored position, lenses close together. You cannot view through them like this as they don't line up with your eyes. In a later scene, when Papa Boule is driving the train through an air raid, he uses the binoculars correctly in the open position.