Corrected entry: When Heath and his crew are entering into the World Championships, we hear the crowd begin to chant Ulrich's name, but if you look at the crowd in the background, they are simply yelling, and their mouths are not in sync with the chanting at all.
Corrected entry: When knights jousted, they would only ride on the left-hand side of the barrier as it was easier to hit their opponent. In this film, they only seem to right ride on the right-hand side of the barrier.
Corrected entry: During the last joust of the movie William is injured but when the joust is finished he hops right over the fence using his injured arm as support, and appears unaffected by the injury.
Corrected entry: At the end of the last jousting scene, William is stabbed in the shoulder with a lance, but there's no hole in his shirt, only blood.
Corrected entry: In the opening sequence when the captions come up "In medieval times, a new sport emerged...", we see a knight being knocked off his horse in a joust. The knight being knocked off is wearing Heath Ledger's original suit of armor. (You can tell by the shield he is holding - it has the three phoenixes on it.)