Audio problem: At one point, I think it's when they arrive at the dead Hydra, Aeetes' Captain (with the brown "bobble-hat" and the moustache) says a line like "Some of you up there....and that way," and is pointing to direct the soldiers. It is very obvious that he is not saying this line and that it was dubbed on afterwards.
Jason and the Argonauts (1963)
1 audio problem
Directed by: Don Chaffey
Starring: Laurence Naismith, Gary Raymond, Nancy Kovack, Todd Armstrong
Continuity mistake: When Jason and the Argonauts pass through the clashing rocks, the necklace of Poseidon around Jason's neck changes from shot to shot, sometimes it's not there, sometimes it's tighter around his neck, other times it's a long necklace.
Zeus: If I had to punish every blasphemy, I would have no followers.