Continuity mistake: When Sidney is first going into the house for the end of the movie it is clear that she is not wearing the vest underneath her clothes and as she is walking around or when she is rolling on the ground fighting with her half brother you see her bellybutton but then she has the vest on and it goes over the belly button.
Continuity mistake: When Jennifer is in behind the mirrors, we see that she was by the 3rd mirror from the end when the killer stabs her. However Dewey had already shot that glass out and only 2 were remaining out of the 6. (01:24:50)
Continuity mistake: When Christine gets out of the shower at Cotton's apartment she has dried off, stood and walked on the carpet, and put on a nightie. When the stereo starts blasting and she walks down the hardwood floored hallway her feet leave very wet footprints which she slips in later when the killer chases her back up the hallway. (00:03:40)
Continuity mistake: When Sidney is fighting the killer, when ever a big stunt comes up, the killer's hair gets lighter.
Continuity mistake: When the killer and Sidney are locked in the screen room together and the killer slits the movie producer's throat, if you watch closely when he's talking to Sidney and waving the knife around that in the first shot there's blood on the knife and then it goes to Sidney and back on the killer and when it cuts back there is no blood on the knife. It then again goes back to Sidney, then back to the killer and the blood has magically reappeared on the knife. (01:36:00)
Continuity mistake: In the scene where Gail and Dewey find the killer's voice changer, Gale's hands are clean, but when it shows her hands picking up the device, there's dried blood on them. But when it shows her hands again, the blood's gone. (01:16:05)
Continuity mistake: Gale and the killer go flying through the basement door, you see the door opens out, but when they crash through it, it opens in. Its not a two way swinging door, because you see the hinge at the top of the door to open it out, not in.
Continuity mistake: The knife that was thrown at Dewey left the killers hand with blood all over the blade, but was perfectly clean when the butt of it hit his head to knock him out at the top of the stairs. (01:26:55)
Suggested correction: Watch in slo-motion the sequence when he gets hit and you'll see the blade is bloody even during that. He then pulls out of his sleeve (literally!) a clean knife, but it's not supposed to be the original one, since he never retrieved it.
Continuity mistake: At the start of the movie when Cotton's girlfriend is being stalked by the killer, he stabs his knife through her bedroom door making a few large holes, especially with the first stab mark. Later, when Cotton finally gets to the house and is lookng for his girlfriend, he goes up to her door and there are now far smaller holes in the door, all in a nice pattern. When he smashes through the door, from the other side we can see there's no damage at all, then when his girlfriend emerges the stab marks are back, but in a different configuration. (00:07:35)
Continuity mistake: Christine gets out of the shower. In the next scene of her putting her nightie on, she has make up on. (00:04:15)
Continuity mistake: When Gale finds Roman in the coffin, there's no blood on Roman's elbow when the shot is closing in on the coffin. When Gale opens the coffin, the elbow is covered in blood. (01:17:40)
Continuity mistake: In the first killing scene, the study which both Cotton and his girlfriend end up in has a white ceiling with a skylight. But when Cotton is stabbed and looks up at his killer the ceiling is light orange with beams across it. (00:05:35 - 00:09:15)
Continuity mistake: At the end of the movie, after Dewey asks Gale to marry him, she lays one on Dewey. She leans to the left of his face when they start kissing, and at a cut away long shot she suddenly is kissing on the right... then the close up is back at the left. (01:44:30)
Continuity mistake: When the actors, Gale and Dewey are hanging around in Jennifer's house, they realise a fax is coming through. When Jennifer first approaches the machine, notice that there is actually no paper in the machine. A few shots later, the paper supply has suddenly been replenished. (00:44:20)
Continuity mistake: When Sidney is talking to the killer in the police station, her phone has a "Nokia" sticker on the bottom of it. Later in the scene, it's gone. (01:29:15)
Continuity mistake: In Scream 2 Dewey walks with a limp and his right arm curled up. In Scream 3 he walks with a limp and his left arm curled up.
Continuity mistake: In the opening scene Christine is completely dry when she steps out of the shower. (00:03:05)
Continuity mistake: Before Sidney pulls the killer out of the door on the house set, we see the bedside table is lengthwise against the wall. As the killer falls towards the bed it's turns 90 degrees, so the bed is a bit closer to the door. (01:05:45)
Continuity mistake: The first time Gale goes to Jennifer's house, if you look when Dewy gets out of his car the window is down. Look quickly to see when Dewy closes the door the window is up. (00:30:40)
Suggested correction: I really can't see it. He gets out of the car and closes the (car) door in the same shot so it's not that. He gets out of the car (the window is indeed down) and then goes to the front door, but he does not close that door, and from there you can't see the driver side window anyway. Am I missing something?
Continuity mistake: When the bodyguard finds Gale eavesdropping on Dewey and Jennifer, they soon confront each other and Tom is sitting in a chair with his left hand on the arm rest. In the next shot Tom is smoking a half finished cigarette with his left hand, but he had no time to change the hand with the cigarette in it between shots. (00:40:00)
