Other mistake: At Skull Rock, when Peter Pan mimics Captain Hook's voice while talking to Smee, just as he says, "Oh, and one more thing," note the handle of Peter's dagger. The animation of his dagger is bizarre, the handle's grip is separated from its pommel, as if it's going through Peter's forearm. (00:41:50)
Other mistake: When King Arthur confronts Mordred in the Abbey ruins on the cliff tops, you can see two fighter jet planes flying up the coastline behind him.
Other mistake: In one scene Tyrone Power and his men survey a village where all the inhabitants have been killed by rebels. A dead boy is on a table and as the camera pans back he is wriggling his toes.