Continuity mistake: In the tournament at the end, the other people on horses that are competing don't even try to knock them off their horses.
Continuity mistake: When the guard is holding Katy hostage in her room, he is not wearing a helmet but when he exits the secret tunnel with her, he has a helmet and chain-mail on.
Factual error: Lord Belasco has his hair pulled back using a modern day hair elastic hair tie.
Factual error: When Calvin is invited to sit at the table with King Arthur and his daughters, as he is sitting down you can see that King Arthur is wearing a t-shirt under his robe.
