Continuity mistake: When Meg and Hercules are walking down the stairs in the garden, Meg has a sheer purple shawl, but when Pain and Panic (disguised as birds) tell her to stop fooling around, it disappears. Then, a few shots later, when she tells Hercules not to thank her just yet, it has reappeared. (00:57:00 - 00:58:00)
Continuity mistake: When Hercules opens the case, all that falls out are two pots, two bowling pins, a helmet, a sword, and two pairs of armor. A purple cape, two shields, many other pots, a sandal, a trophy, and a white ball with a blue stripe are among many of the additional items that appear out of thin air in the very next shot.
Continuity mistake: In Thebes, when a vendor opens his cloak and asks if he wants on sundial, his fingers go from being underneath the cloak to over it.
Continuity mistake: When Hades forms a chessboard to show Meg his plan, the chess-pieces on it change between shots.