Continuity mistake: The rear view mirror on Solo's convertible is there in wide shots, but missing in all the closer shots throughout the Vegas car chase scene. (00:21:00)
Continuity mistake: The KGB's blue car is in good cosmetic condition when the car chase begins. But in one shot, as it's pursuing Solo, there's considerable damage to its front end - from a crash that doesn't happen until several shots later. (00:23:00)
Continuity mistake: During the climactic fight with Janus, Illya gets covered with white dust. When he rolls over and fires the spear gun a few shots later, all the dust has vanished from the front of his coveralls. (01:24:00)
