Revealing mistake: When Sinbad and his men are fighting the pagans' "god of the single eye" centaur, Margiana the slave girl is shown screaming briefly. If you look closely, you can tell it isn't Caroline Munro, but a close look-alike.
Revealing mistake: After the jailbreak, a number of reaction shots for which the shot background is the villagers in the speeding wagon, not only do they not "bounce" with the wagon, they are not even animated.