Continuity mistake: In the scene just before the final attack on the castle, D'Artangan is surrounded by his fellow Musketeers. He gets off his horse and while doing so there is a tight close up where you see clearly that he is wearing his Musketeer outfit that he threw down on the floor in the previous scene. When he finishes talking to the horse (and he is back in his normal clothes) Porthos hands him the Musketeer uniform, which D'Artangan then puts on. (01:20:45)
Continuity mistake: After Joe picks his daughter up from her mother's, they drive into Minneapolis. While Joe is talking to his daughter, you can see Macaroni Grill and Galyns out the window as they drive past. After a quick shot of the daughter, when the camera is back on Joe, if you look out the car window again, they are passing the same establishments.
Continuity mistake: 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. (00:49:50 - 00:55:25)
Factual error: The film is set in 1997. There is a scene where Amelie knocks on a house door and in the background is a new model VW Beetle. These weren't available until early 1998. You can also see several scenes with various new models of Fiat Punto and VW Golf which weren't available until 1999. (00:19:00)
Other mistake: When Judith is locked in J.D. and Wayne's basement, she is first wearing a long night gown and she is chained at the ankle to an engine. Then she is given a box of clothes to use and she is next seen wearing shorts - how did she put them on if she was chained at the ankle? (00:45:10)