Factual error: In the scene where Oz is playing lacrosse, there are palm trees in the background. Michigan has no palm trees.

Visible crew/equipment: When Jim walks to Nadia the first time - right after he trips on the couch - a light stand is seen right at the left edge of the screen. This was pointed out in the DVD.

Revealing: During the prom scene, especially during the song "(Don't You) Forget About Me", none of the band guys (especially the older man keyboard player) are actually playing their instruments.

Continuity: During the lacrosse game towards the end of the movie Oz scores a goal - in one shot it shows the ball coming to rest in front of the goal. In the next shot you can see the ball hitting the net and coming to rest again.

Audio problem: When Finch rolls the yellow 1-ball around the table, the first sound you hear is that of a ball hitting another ball, yet no other balls move. No balls are pocketed either - if a ball had been pocketed the yellow ball would have taken a different path around the table.

Continuity: In the famous Nadia on the internet segment, there is a quick shot of the computer before Jim starts to get undressed. If you look on the desk next to the keyboard there is a gray t-shirt. It wasn't there when Jim was setting up the camera and Jim hasn't begun to undress yet. Obviously shot after Jim threw the shirt on the Web cam and it slid off.

Continuity: Finch runs into the girl's bathroom when the laxatives affect him. He tries to take out a toilet seat cover, but there are none left. The side shot shows a corner of the box hanging down below the dispenser, whereas when the shot changes to the front, there is no visible corner. It then returns to the side and the visible corner, and back to the front with no corner.

Continuity: Right at the end of the movie, when Jim is dancing to Nadia we can see Jim's father appearing behind him, but a few seconds later there is an outside shot of the room where his hand is lying on the door frame.

Audio problem: In the scene where the father gives the son the magazines, right before he's about to leave, he taps his hands together, but a loud CLAP is heard, like he really clapped his hands hard, while he just touched them together.

Continuity: When Jim's father hands him the magazine "shaved" he changes between holding them at the top and at the bottom.

Other: During the Lacrosse game when you see Oz score the goal, there is an illegal hit, Oz has the ball and a player from his team hits another player on the opposite team, that is an illegal hit and the goal would not count.

Continuity: When the boys are sitting in the living room talking about how they have to "do it" before graduation, one of the boys sitting on the couch has his legs crossed, then they uncross, cross,and uncross. They keep changing positions.

Deliberate "mistake": In the scene where the father hands the porno mags to his son, if you look real carefully, you can see the son hide one of the covers from the camera with his hand.