Continuity mistake: In the action sequence where Cotton pushes Ghostface against the bookcase, the killer faces the wall, then at the cut he is facing Cotton before the case falls on him. (00:08:55)
Continuity mistake: 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. (00:37:10)
Continuity mistake: The ice pick remains free of blood even when Sid has stabbed the killer with it twice.
Continuity mistake: Gale's bangs change lengths throughout the film.
Continuity mistake: When Sarah tries to fix Roman's statue's head, her hair is over her face, when she goes to answer the phone her hair is pulled back behind her ear. (00:23:20)
Continuity mistake: In the beginning when the killer is trying to kill Cotton, he pulls a book case on the killer, but if you look carefully you see that the killer slides to the side, despite the fact that the book case is meant to have hit him. (00:08:55)
Continuity mistake: 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.
Continuity mistake: Dewey rolls down a hill after shooting at the killer. The cut on his forehead changes shape from circular to two parallel lines then to a straight line and a waved one.
Continuity mistake: Roman's sideburns change lengths towards the end of the movie.
Continuity mistake: Jennifer's house, the door just opened on its own. For some reason, Angelina and Tom don't shout back at Dewey and ask what's up, but rather jumpscare him. With Dewey's gun pointed at him, Tom has both hands in the air. In the same shot he lowers the right hand, but in the next he's with both hands up again. (00:43:20)
Continuity mistake: Look at the shirt David Arquette is wearing when he's out at lunch with Gale, heading then to Jennifer's house for the first time. They learn about Sarah's murder and head to the crime scene, and Arquette is wearing a different shirt he'll wear for the party later. Admitted by Wes Craven himself in the DVD commentary track. (00:33:40)
Continuity mistake: When at the diner's Gale answers "Well, I have written the definitive book about the Woodsboro murders", her arms are open; her hands were joined earlier. (00:28:30)
Continuity mistake: When fake-Gale mentions "your private self-loathing", an extra exits the frame to the left side. Over five seconds pass before the extra walks into another shot of the dialogue. And there she is again, but this time redoing her walk from the beginning, when Dewey embarrassed repeats "Little girl inside." (00:17:05)
Continuity mistake: Jennifer is reading the fax page using her flashlight; without moving her hand, she holds the sheet by the top corner at first, then in the bottom half. (00:44:25)
Continuity mistake: Stone falls face down in front of the entrance, his arms raised forming (very roughly) right angles. When Dewey screams to the others to get inside, Stone's left-hand touches his head. (00:43:45)
Continuity mistake: Steven Stone picks a few coins from Dewey's counter. You can see that there are 5 left in the wide shot, but only 4 in close-up. (00:42:10)
Continuity mistake: Confronted by the cops, the director says "I did not call Sarah Darling." In the background, look at the dark-haired extra that joins the other two by some stage equipment. A couple of cuts later she's just walking by them. (00:35:10)
Continuity mistake: When the cops go talk with Roman to ask him about his meeting with Sarah Darling, you can notice that Jennifer's bodyguard grew longer sideburns in the space of minutes since the scene at the house. Noticed by producer Marianne Maddalena on the DVD commentary track, and apparently they had some talks on set about that. (00:35:00)
Continuity mistake: After the scene with Posh Spice's former bodyguard giving 'Dewdrop' a piece of his mind, we see the detectives at work. The hands in close-up hold one of the photos by the bottom, but in the wider angle detective Wallace is holding them by the sides. (00:33:45)
Continuity mistake: Sarah is trying to fix Roman's statue with some tape. She does it holding the statue the exact opposite way in the two camera angles. (00:24:35)
Answer: But Roman is in police custody when the call happens and Kincaid has Dewey's phone.