Continuity mistake: In the first pursuit of the Creepy Thin Man, at the party, the girls are running down the stairs while they change and begin to litter the stairwell with clothes. There's one wig dropped that's dark brown/black and straight. Though Lucy's hair at the party does appear shorter than her actual hair length, her hair is curled up at the ends, not straight like the dropped wig. So whose was it?
Continuity mistake: When the girls figure out that Knox is after Charlie, and Dylan thinks of the picture and they zoom in onto "Townsend." The shot before the final shot of the photograph shows Knox's father's arm around Charlie, when in all the other shots, he has his arms above his head.
Continuity mistake: In the scene where the Angel throws Lucy's "homemade" muffin: The first muffin actually broke through the door and you could see the depth and the cracks around the point of entry. When the girl comes through the same door, you can see the door no longer has a hole in it, just a fake muffin with adhesive attached to the door to look as if it had done so previously.
Continuity mistake: At the beginning when the guy with the bomb and Drew Barrymore's character, in disguise, are falling out of the plane the guy with the bomb has it still strapped to his chest but after they land in the boat the vest has disappeared. It reappears a few moments later but then again disappears.
Continuity mistake: In the scene on the plane at the beginning, just before the bomber speaks, a stewardess passes in front of the camera. It's obviously to cover a cut - after she's passed, the amount of sun visible on the seats changes, the two women behind are closer to the camera, and the nun's looking the other way.