Continuity: 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.

Continuity: When the killer and Sydney 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 Sydney and waving the knife around that in the first shot there's blood on the knife and then it goes to Sydney and back on the killer and when it cuts back there is no blood on the knife. It then again goes back to Sydney, then back to the killer and the blood has magically reappeared on the knife.

Continuity: After the killer chases down Tyson smashes him into the cabinet and throws him off the balcony you can see the black fabric of the mat fly up after the stunt double landed on it.

Continuity: 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.

Plot hole: It has already been mentioned that a certain shot reveals that Sydney isn't wearing the bullet-proof vest when she should be. Further to this, most of the shots in the climax sequence make it impossible for her to be wearing one, as you can see the contours of her chest throughout. A bullet-proof vest would flatten the appearance of this.

Plot hole: How did Kincaid get a picture of Syd from the Delta Lambda Zeta party in part 2? No one took any pictures of her. Aside from that, anyone who's seen pictures of Neve Campbell online will know that that's a publicity shot from Scream 2 rather than something intended to be a "real" photo.

Audio problem: When Tyson is running down the stairs he yells something but his lips don't move.

Continuity: When Sidney is fighting the killer, when ever a big stunt comes up, the killer's hair gets lighter.

Continuity: When Sarah (the one who's supposed to play 'Candy') is stabbed, her blood is dried when she slumps over the door.

Continuity: 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.

Continuity: At the end of the movie, after Dewey asks Gill to marry him, Gill 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!

Continuity: 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.

Continuity: 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: 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.

Continuity: The second time Gale shows up at Jennifer's driveway (right before the place blows up), one can clearly hear her turn off the lights and remove the keys from her car. Yet, when she opens the door, the car still makes that beeping noise that happens when you leave your headlights on or leave your ignition key in the ignition.

Continuity: In the scene where Sydney is boarding the school bus, when the bus doors are fully open there is a reflection of a stop sign attached to the bus but it is not on the bus.

Factual error: In the beginning of the movie, the killer calls Cotton on his cell phone. When the killer hangs up on him, you hear a dial tone. When someone cuts you off on a cell phone, you don't get a dial tone.

Continuity: 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: When Sydney 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.

Continuity: In the scene where Jennifer gets killed and falls through the mirror look at Dewey's hair it's all messed up, but in the scene right after that when Dewey and Gale are looking for Tyson his hair's all combed back again.