Continuity mistake: Just after Knoll has been beaten up we see Elwood sitting next to him. As Elwood switches on the light, we see that the left side of Knoll's face is covered in blood. After Elwood applies the bandage, the blood on his face has changed with much less blood on the left side. The blood was never wiped off.
Continuity mistake: During the pep rally routine during the first stunt there are 5 guys holding the five girls up, one for each girl. But during the second stunt there are two girls in two different lifts with three guys to each girl. If in the first stunt there was only 5 guys, where did the 6th one come from?
Continuity mistake: After Ciki gets out of the trench to get a lighter from his pal's bag he lights a cigarette while he is still squatting outside the trench. In the next shot you hear the lighter snap shut, and Ciki is leaning against the wall of the trench. (00:12:30)
Continuity mistake: There is a scene when a girl knocks on the door of the house of her friend. She opens and in the background you can see another girl doing nothing. The shot later she has disappeared.
Continuity mistake: When Max punches a hole in the wall after hearing about General MacArthur being called a commie, the hole in the wall changes height and size as the camera angle switches back to him from showing the reaction of his writers.
Continuity mistake: When the man is laying out the photo files on the desk, he puts down files one, files two, and then file three. In the next closeup the position of photo film number three has changed.
Continuity mistake: When Matt Dillon is talking to Michael Douglas at the bingo hall, the caller calls out "O 18". Later in the film during a different game, it's called again. All Bingo junkies know that the "O" numbers are 61 through 75.
Continuity mistake: In the scene at the little bar Bruce Willis kicks Billy Bob Thornton's chair over. Kate Blanchett picks Billy Bob up and tries to dance with him. A different angle shows Bruce Willis still at the table and the Billy Bob's chair is now upright.
Continuity mistake: When Margot is telling the story about how she lost half her finger it shows her putting the log up to be cut and it shows her left hand on top of the log. But when the shot moves out to show when her finger gets cut off, her right hand is suddenly on top of the log.
Continuity mistake: Towards the end of the movie during the play, Kelly goes backstage during intermission, and her hairstyle and color has changed. (According to DVD commentary, it was a pick-up scene and she had already started filming Spider-Man. That's why her hair was now red. Still a mistake, but there's the explanation.)
Continuity mistake: When TJ jumps in the dumpster at the school to hide from the guys in suits, he sees two guys and another who's dressed up like Principal Prickly in his normal shabby suit, but then a second later when he takes off his Prickly mask he's in a black suit.
Continuity mistake: At the end, right before Matty is going to toss his keys inside the Cadillac, the window is only down a tiny bit, but when he actually tosses them the window is all the way down.
Continuity mistake: When the girls go to the first party and Scott comes up to Madison to ask her to dance notice that he is visible before - he is bent over right behind Madison and Alex and then just straightens up to talk to them.
Continuity mistake: When Mario walks out of the bus station to meet his auntie and cousin, he is holding 3 bags. 2 rucksacks and a sports bag. The sports bag is all black. When he arrives at his auntie's house, he takes his bags out of the trunk. The 2 rucksacks are the same, but the sports bag has gone from all black, to red and green. (00:45:10)
Continuity mistake: The image of "Che" Guevara hanging from the rear-view mirror keeps appearing and disappearing during the first part of the road trip, right before it is substituted by the toy rabbit Luisa buys at the township.
Continuity mistake: In the scene on the sidewalk where Bev is pretending Faye is her mom (and she's practicing to tell her mom that she's pregnant) the same people walk by several times. I don't think there was a single shot-reverse-shot sequence that had the right people walking by at the right time. You saw the same couple, for example, walk by at least four different times.
Continuity mistake: When Baby Powder smacks I Need Money, his visor falls off. In the next shot, when they are all falling out the door, the visor is back on his head. (01:04:20)
Continuity mistake: When Vince Vaughn's character gets busted for talking on the "job phone" (in the beginning), he hangs the cordless onto the receiver (wall-mounted). The next cut back to him shows no handset, only the receiver.
Suggested correction: When he hangs up the phone, it remains hung up on the wall receiver for the rest of the scene. The phone can be seen several times before the scene ends. The way you can tell is this: when the phone is off the receiver, there is a stripe of grey duct tape holding the receiver to the beam. The phone does not have any duct tape on it, so when it is hung up on the receiver, the duct tape is no longer fully visible, because the handset is covering it.
Continuity mistake: Jennifer Lopez's hair changes from one scene to the next throughout the entire movie. One minute she has fresh highlights, the next scene she has two-inch roots, the next she has all dark hair.
Continuity mistake: At the end level, when the gang are in the arcade, the phantom virus makes one of the videos games grab Fred. Some of the wires are red, but when the wires curl around Freds legs, they are all green.