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Character mistake: When they are surprised by Gale, Billy angrily says to Stu "Man, I thought she was dead." To which Stu replies "She looked dead, man. Still does." However, Stu didn't have time to check on Gale, since she crashed the vehicle moments before Sidney is attacked by a Ghostface that had to be Stu himself (since he does the quick clothes switch coming from the car).

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Other mistake: When Stu brings Sidney's dad out in the kitchen, you can see behind him a September 1996 calendar. Earlier in the movie, the scenes inside Principal Arthur Himbry's office do show a September calendar, which is obviously the intent of the movie, but it's a September 1997 calendar.

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Continuity mistake: When Billy jumps on Sidney in the corridor making his comeback, a bag of potato chips that was lying against the bench's armrest goes from vertical to horizontal. It wouldn't be surprising that a small and possibly mostly empty bag would be toppled over considering the movement that just occurred, however when Sidney headshots Zombie Billy the bag is back being vertical. (01:41:20 - 01:42:30)

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Continuity mistake: In the close-up with Sid smashing the vase on Stu's head, her arm is bloodied all the way down to the elbow, while when she reached for the object the blood reached just about the wristwatch. (01:40:40)

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Continuity mistake: When Sidney bites Stu's hand, in close-up the wrist is well visible and displays the bracelet in full, but in the wider angle that section is entirely covered by the bloody sleeve. (01:40:35)

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Revealing mistake: After Billy's stabbing, Stu charges Sidney projecting her through a doorway. In that shot you can easily see that Matthew Lillard is replaced by a stuntman. (01:40:15)

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Continuity mistake: Stu is slumping against the desk and says he's dying. In the closer angles you can see his left fingers are coated in blood, but in wider angles (for instance when Billy grabs the receiver off him and yells "I'm gonna rip you up, you b**ch"), the fingers are cleaner. (01:38:40)

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Continuity mistake: Finding out that the gun is gone, Stu whines "Houston, we've got a problem here." Sid in background turns towards him instantly, but she re-turns in the next shot. (01:36:35)

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Continuity mistake: Stu puts the voice box and the cellular phone inside the breast pocket of Sidney's father; the order is clear and visible even after Stu pushes the poor man to the ground; the white box is in front of the black phone. A minute later once they two-stooged their alibi we see again Mr. Prescott on the floor, and the two devices have swapped place in his pocket. (01:34:20 - 01:35:30)

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Continuity mistake: It's stabbing time for the two idiot killers; Stu is about to plunge his knife into Billy. Notice Matthew Lillard's necklace as he says "I'll remember"; it's above the sweater. Cut (camera cut, that is), and it's under the sweater. Next time we see it, back to a previous angle and to the necklace being above the sweater. (01:35:10)

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Continuity mistake: When Billy is taunting Sidney saying the game is called "guess how am I gonna die" he is holding the voice box in a different way between shots. (01:31:20)

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Continuity mistake: When Stu and Randy are begging Sidney at the front door accusing each other, Neve Campbell's hair is pressed against her body or on top of her right arm in different shots. (01:29:10)

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Revealing mistake: When Sidney discovers Tatum's body, we see her head intact, in particular the eye level. In her death scene, her cranium was being crushed right at the eyesocket. (01:07:25 - 01:22:15)

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Continuity mistake: After her first time with Billy, Sid brushes her hair. She puts the brush back on the bedstand, but the phone on it changes angle between shots. Later in the scene, you can also see the brush's handle sticking out from the side of the bedstand by the bed, or the one facing front. (01:18:55)

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Continuity mistake: When Gale and Dewey nearly end up as roadkill for a bunch of teenagers who are really on a rush to go see Fonzie hanging by his entrails, Gail initially is on Dewey's right, and you can see Courteney Cox pulling David Arquette's right arm. The stuntpersons though are in a different position, the woman being on the left. (01:17:50)

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Continuity mistake: When Randy pauses Halloween to launch himself into the famous "rules to survive a horror movie" speech, look at the table. There are two bottles of beer, the leftmost one apparently still with a cap. You can still see it when everyone toasts to the "no drugs and booze" rule. But as he reaches the third rule, the "I'll be right back" one, that beer is gone, and Stu is leaving to get himself a new beer. (01:13:35)

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Other mistake: During Tatum's murder we see some problems exacerbate. The killers are not supposed to be invulnerable and are wearing a cheap costume, but they receive hard hits (Tatum breaks two bottles of beer, one straight to the face) and they don't have a single scratch. When she is killed, nobody hears her scream and nobody else needed to grab a beer either. Furthermore, Ghostface has the garage door fully open, but without knowing who is on the other side, that is one room away from the others, goes by the mysteriously unlocked door to the inside of the house. And we see Billy (who should be the killer there, since Stu was at the party) join in coming from outside.

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Continuity mistake: In the garage scene, the position of the items by the door and switches changes without in theory anyone touching them, and does it suddenly too. For instance look at the blue board and how it is tilted towards the railing after Tatum has thrown the last bottle, or how the silver and red board is in front or behind another item. (01:05:00 - 01:07:00)

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Continuity mistake: When Stu announces all excited that the chick from the news show is at the door, look at the necklace he's wearing, and how it changes position (barely touches his shirt's neck in close-up, it's lower in the wider angle). A few moments after, when Tatum beckons Dewey, he is even wearing it under the shirt - and Stu hasn't messed with his clothes in the meantime. (01:03:30)

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Continuity mistake: The doorbell rings during the party and Stu tumbles over the couch to go get it; does so in two shots that are completely off when it comes to continuity, just look at his robe, and Rose McGowan's gestures with the toothpick. (01:03:15)

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