Arabian Nights (1942)

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.

Factual error: Haroun swings on a rope to knock Sheherazade's buyer off his horse and uses it for both to escape the slave market. Only thing is: the entrance to the market place is higher up than the auction platform, so the swing should have ended right in the steps, not on the higher ground.

Factual error: In the desert harem, a cacadu can be seen sitting in a hanging loop. Cacadus are native to Australia, though, and in the 9th or 10th century AD (the period Haroun al Rashid lived in), Australia did still not exist in the then-known world.

Trivia: A point of interest: The big battle scene at the end of the movie was reused for the beginning of the movie 'The Golden Blade', starring Rock Hudson and Piper Laurie.

Scheherazade: I would swear I have seen this man before. But where?
Ali Ben Ali: Maybe in your dreams.