Revealing mistake: In the beginning, the harem teacher and his pupils read the story (which becomes the movie) from the book Arabian Nights. The huge book propped up in front of the old man, though, is only an empty cover with no pages at all.
Continuity mistake: When Woody has the landing gear lowered on the burning airliner, only the right main gear comes down. When Pappy warns him that the other gear isn't down, he pulls up and goes around. As the camera pans over the plane, it shows the left gear down, and the right up. Then when Woody retracts the gear, once again the right one is down.
Revealing mistake: In the scene towards the beginning, when the Chinese mob are talking in the car junk yard, the Chinese guy about to be crushed to death is begging for mercy. While the Chinese mob are talking, when the camera pans to the guy about to be killed, you can clearly see that it's a dummy, then in the next shot it's the real guy again.
Factual error: When King Cutler shoots his brother near the end of the film, he uses a revolver, a weapon not produced until the next decade.
Continuity mistake: Near the end, as a plane is getting ready to run down the airstrip, Bogie knocks the gunman out, then uses the gun to shoot the plane in its tracks. When the machine gun starts to fire, it has a long strip of bullets, then fewer, and so on.