Continuity mistake: At the end of the movie, they come to take away the body of Big Baby Sweets, and it's night time. You can see the night sky behind the actors. However, after Sweets' makeup is wiped off, the camera pans back and you can clearly see the daytime sky behind them.
Other mistake: When Twoie first appears he is naked because he was just made. Yet when he walks toward the mirror, you can see at the bottom a strip of blue jeans.
Other mistake: When Kevin and Perry go home to find the postman at the front door, the postman asks Kevin to sign for a letter (his father's). If you look closely at the address on the postman's sheet it does not match the address on the letter. You need to be quick and look closely.
Other mistake: In the beginning of the movie when Kimberly is shackled to the floor you can see that the padlock isn't locked. She could just take it off and be free.
Factual error: There is a a scene showing round bales of hay and as anyone in this district would know we never had those shaped bales out here in Parkes when man first walked on the moon, we only had the old rectangle shape bales of hay.
Continuity mistake: When the advocate announces to his mother that he intends to marry Malena she gets mad at him. When he runs down the walkway she throws first her stick after him, then her shoe, but if you look closely she is still wearing both her shoes. (00:51:00)
Revealing mistake: While the guys are going for their physicals, there's a scene in which blood is drawn and you can clearly see the tube connected to the end of the syringe pumping fake blood into the container.
Visible crew/equipment: When Crick comes in to see Matt and Patty together, you can see the reflection of a cameraman in the window.
Continuity mistake: When Kate is eating the olives at the Christmas party it shows her with only one left. It then cuts back to Jack Campbell and when it cuts back to Kate she suddenly has two left on the toothpick.
Continuity mistake: In the scene where Lucy sang and won the $500 competition, when they are announcing she's the winner they show a far away picture, and Lucy has the money in her hand. Then they show a close up picture, and Lucy doesn't have the money - the announcer does, and then hands it to Lucy.
Continuity mistake: When Gwen is watching the soap opera Santa Gruz, together with Eddie, in the front shots of the TV screen, you see a video cassette on the top of the TV with the heading "SONY". But, in the side shots of the TV screen, you see that the same video cassette is turned. (00:58:45 - 00:59:45)
Factual error: When Ryan and Jennifer are hanging out at their lookout spot, over the Golden Gate Bridge, they are looking at the bridge from the Marin County side. For those of you who aren't familiar with Bay Area geography, the distance between Berkeley and Marin County is about 15 or 20 miles, yet the two refer to walking back to campus a few times.
Revealing mistake: In the scene when Rusty hits Chip with the lamp near the end of the movie, you can see the lamp miss his face.
Revealing mistake: In the scene where Rocky and Bullwinkle are walking through the university with Kenan and Kel (right before they come across the anti-moose protest), Kel's right arm passes through Rocky's left several times.
Continuity mistake: I don't think it's quite a mistake, but in almost every scene with Madonna, she has a mysterious shadow over her forehead. In full shots, no shadow, but when they cut to her close-up, there it is. It's more annoying than anything else (aside from her acting).
Continuity mistake: When Tony is stuck in the tunnel in the prison and is talking to Wolf, there are still several feet of tunnel ahead of him before the end of the tunnel. But when Wolf gives him a push, he is shown coming right out of the tunnel's end.
Continuity mistake: In the underground garage scene with Russ, Rusty and Janet, Rusty's hair is combed straight down and very neat when he comes out from behind the pillar. When Janet says, "I should have worn my magic bra and panties.", Rusty starts laughing and his hair is messed up. But then when Rusty is snapping his seat belt as he's sitting in the Porsche, his hair is back to being neat.
Continuity mistake: After Eddie serenades Claire at her window, they go to talk on her front porch. Eddie's coat alternates being completely on and halfway off between shots. Keep an eye on his right shoulder.
Continuity mistake: The door that the boys find in the pile is green. For one shot in the junkyard the door is white.
Audio problem: Near the end of the movie, when Leon Phelps is giving a speech to all his "victims", the camera starts to move up and over his head. If you keep your eye on Leon's mouth, it doesn't move for the last three or four words he says.