Visible crew/equipment: When Chrissie gets knocked out by the plant pot, you can see a safety mat conveniently placed next to her. (00:17:00)
Continuity mistake: At the start of the movie, where Jim's father comes into the dorm room after that guy unlocks the door for him, he comes in, and drops the six-back of beer then sees what Jim is doing, at an angle. When it drops to the floor, it is standing. Wouldn't it be on its side? (00:03:00)
Continuity mistake: In the scene where Jim meets Michelle at band camp and he guesses that a bear came, when she is saying "It's like you can read my mind," there is a side shot of her, and you can see that the hair down her right side is one big group followed by a few obvious strands just in front. When the shot changes back to a front view of Michelle there are no extra strands visible. (00:27:40)
Continuity mistake: At the beach house, Finch is putting up his graduation photos of him, Stifler, and Stifler's mom. The top photo, Stifler's mom is not wearing the graduation cap, the bottom one, she is. Later, after Stifler's brother shows up and Finch is disappointed, he takes the pictures down but they have reversed their order. Stifler's mom with the cap is now on top. (01:00:12 - 01:16:45)
Factual error: The movie is supposed to take place in Michigan, but you can often see the southern CA mountains in the background in the beach scenes. There are no mountains in Michigan that look like those.
Continuity mistake: In the scene where Jim makes a fool of himself by trying to play the trombone, he yells into the microphone and turns to Michelle ( who is sitting towards the left of the row of seats). He asks something like, "What should I do?" He then turns around and the camera cuts to a different angle. Now, he is standing in front of a girls that is two seats down from Michelle. (00:32:40)
Factual error: The end credits to the movie, which features the Harvey Danger song "Flagpole Sitta" (1997), incorrectly credits it as "I'm Not Sick But I'm Not Well" by LIT. No such song exists, nor have LIT or any other group ever officially recorded covers of "Flagpole Sitta."
Factual error: The movie takes place in Michigan, however when the boys first arrive in town, a sign reading "United States Post Office Seal Beach, California 90740" can be seen in the background. (00:21:55)