A Knight's Tale (2001) - 5 major mistakes

Continuity: During the scene when William was learning to dance, Chaucer got punched in the nose... so he put a cloth in it to stop the bleeding. In one brief shot the cloth went from his left nostril to the right, then back again.

Continuity: On the jousting scene where William loses his helmet, he has a monstrous bruise under his right eye (in the late afternoon).  That night at the banquet, there is no trace of the bruise. So far as I know, even a black eye doesn't completely heal that quickly.

Continuity: At the end of the film, when Heath Ledger has defeated Rufus Sewell, he is seen with a puncture wound on the upper right side of his chest. In close up the wound is seen to be bleeding through a hole in his jacket but in the next shot it is shown just as a red blob on his jacket with no hole in it. And when the jacket falls open you can see there is no wound underneath. In the next close-up the hole in the jacket is back.

Continuity: During the last jousting scene against Adhemar, William has a piece of red string tied around his neck. While he is riding down to knock Adhemar off of the horse, you see the string in one shot, but not in another, then it is back again.

Continuity: In the scene where Sir William (Heath Ledger) is preparing to fight Adhemar (the "bad guy") he is talking to Geoff Chaucer.  In the background in the stands, you see a figure in a yellow dress (Jocelyn) talking to a figure in brown clothing (John Thatcher).  Jocelyn leans over to speak to John, and then they sit down.   In the next shot, when William is told that Jocelyn had arrived, he looks into the stands, where Jocelyn is again standing, leaning over to speak to John.  They then sit down again.