Continuity mistake: When Vader's shuttle is approaching the Death Star, the crew in the control room of the Death Star are wearing black gloves. One of them then reaches forward to press a button, but in the close-up of his hand pressing the button, the hand is not wearing gloves at all. This can only be seen in the widescreen version. (00:02:25)
Visible crew/equipment: When Superman is landing to stop the plough machine, the wires holding him are visible.
Factual error: When we first see Fatima Blush, she is waterskiing. She is doing several stunts, which are only possible with one ski, the most notable being skiing backwards with one foot in the air. However, when she releases the tow rope and skis up the ramp into James Bond's arms, she is on two skis. (00:45:55)
Visible crew/equipment: At one point Clint Eastwood is out in the woods practising his shooting with his new .44 auto-mag pistol. While he's doing this, a car pulls up and a black male begins to get out with a shotgun. (We later learn that this is his partner). As the man with the shotgun is opening his door, if you look at the reflection in the car window, you can clearly see the reflection of a man with a camera and another man standing next to him.
Continuity mistake: At the end, just before Bronson shoots Warren in the forehead, Warren's hair goes from messy to perfectly neat. (01:39:45)
Continuity mistake: When Roy Scheider's partner is killed, he is run over by a car. After the car runs him over, his body rolls and you can see his arms swinging freely even though his hands were bound by the plastic ties. Later when you see his body, his hands are bound again. (01:10:30)
Continuity mistake: When Bond takes off in the plane, we see - in one shot from Bond's view - the Cubans approaching. The background is a flat (English) countryside. In the next clip, we see a close-up of one of the Cubans. behind him are quite large hills/mountains. (00:04:55)
Continuity mistake: When Cho chases the van, he grabs on to one of its ladder steps. In the close-up, he's holding on by the ladder bars.