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)
Plot hole: How could the police miss finding Cybil in the trunk of Michael Zane's car when it was in an impound lot? They would have definitely searched the car if he was found in violation of a federal offence (for carrying the weapons). Even if they didn't do a search, they would certainly have heard the sounds that Cybil would have made from being locked in the trunk.
Factual error: When the Betty Doll takes off, there is a rapid fire selection of different shots of how the craze is impacting the nation. During the baseball scene, the shot starts with a L.A. Dodger (Eric Karros) hitting a pitch from a New York Mets pitcher (appears to be John Franco). The shot changes to that of the baseball going into the stands... in Wrigley Field, home of the Chicago Cubs.
Continuity mistake: When Brittany Murphy writes down the number on the glass she writes it backwards because that's how she sees it in her mind. Watch closely, though, and you'll see a perfectly normal 2 which isn't written as a mirror image of 5. Later, when Michael Douglas realizes this catch, he looks at the piece of glass again, this time from the other side, and the 2 has turned into a 5, which apparently was written in a different style. (01:40:12)
Continuity mistake: After Jet Li has arrived in France and has left the cab, he is walking up a road which seems like China Town to find the shop with dragon in the window. As he arrives near the shop a prostitute with a long black jacket and red hair is standing and talking to a man wearing jeans. Then Jet looks at the picture and then at the dragon, the camera angle changes and as Jet is about to walk in you see the same woman standing against the wall and the man has done the Jet Li vanishing act.