Continuity: When Stifler's mom and Finch are talking, before they use the billiard table, Stifler's mom's hairstyling (close-up) changes from one shot to another (left side from your point of view).
Continuity: The balls on the pool table when Finch is talking to Stifler's mom.
Continuity: The position of the camera on the computer goes from a tight shot on the bed to a wide shot of the room.
Factual errors: In the credits, Mark, Tom, and Scott are listed for Blink-182, however Scott was not in the movie and is no longer in the band. It was Travis Barker who appeared in the movie playing drums, not Scott.
Continuity: When Kevin and Vicky get to their room, Kevin starts taking out candles from the drawer on the nightstand. When they are lying in bed, the candles are lit, when they are getting started, the candles are still lit, but during the last shot, the candles are nowhere to be seen.
Errors made by characters (possibly deliberate errors by the filmmakers): In the "pie scene", Jim's mother's note reads "Apple - you're favorite...” It should, of course, be spelled "your".
Crew or equipment visible: When Finch is running for the restroom, the mike wire is visible under his shirt.
Continuity: Set in Michigan, at one point a parking lot full of cars with California license plates can be seen out a window if you look sharp.
Continuity: Oz's hair in the final scene.
Continuity: During the start of the scene where Jessica and Kevin discuss Vikky receiving an orgasm, Jessica's hair changes between shots just before Stifler turns up.
Continuity: During the last scene where Jim, Finch, Kevin, and Oz are sitting around the table, the hair hanging down Oz's forehead changes positions between shots.
Audio/visual unsynchronized: When Jim's Dad is showing Jim porno mags in his room, Jim's father lightly touches his hands together. However, the sound made is as if he loudly clapped his hands.
Crew or equipment visible: When Heather and Oz are in his dad's food shop you can see the light from the camera and some of the crew behind Heather when she is sitting at the counter.
Audio/visual unsynchronized: When Stifler is puking in the bathroom, Jim walks in and we hear "Damn, Stifler, what'd you drink?" but he only says, "Damn, Stifler."
Continuity: When Jim's Dad hands Jim the third porn magazine, the first couple of shots show his hands at the top of the magazine. In the next shot, when Jim takes it from him, Jim's Dad's hands are at the bottom of the magazine.
Crew or equipment visible: In a scene where Jim is walking towards Nadia, a C-Stand is visible on the left.
Crew or equipment visible: The bottom of the take marker can be seen at the top of the screen for a moment while Jim talks with Michelle in History class.
Continuity: When the "pact" is first formulated, Finch's legs can be seen both crossed and uncrossed depending upon the camera's angle.
Continuity: The QuickCam has been glued at a 45-degree rotated angle in its base, as evidenced by the visible tripod mounting bracket normally hidden down in the base; however, it still produces rightside-up images.
Revealing mistakes: In Jim's room, you can see that there is no ceiling.
Continuity: When Nadia opens Jim's drawer, the jar of Vaseline disappears.
Crew or equipment visible: A hand is briefly visible during the webcast as Jim's shirt falls off the webcam. It is actually being dropped in front of the camera.
Continuity: When Vicky comes over to Kevin and Jim at the party Stifler, who was standing behind Jim, walks away. When we next cut to Jim, Stifler is standing in the same position despite having walked away a few seconds earlier.
Factual errors: Lacrosse officials are seen wearing black shorts. Officials of men/boy's lacrosse wear white shorts.
Continuity: When Finch, Stifler, and Kevin are watching Jim and Nadia on the webcam, they can't hear anything, but when Nadia turns on the radio they hear the music loud and clear.
Continuity: While Jim, Finch and Kevin are watching the webcast of Nadia, there are dates available on the screen, all referring to the month of July. However, being in school an preparing for prom, it would have been somewhere between February and April.
Continuity: When Nadia removes her clothes, she is shown to be wearing a pair of bikini-style panties. However, when she removes the underwear a few minutes later, it is clearly a thong.
Crew or equipment visible: When Finch is exiting the restroom, dolly track is reflected in the closing door
Crew or equipment visible: After Oz first sings for the jazz choir and comes to talk to the other guys, a you can see a microphone above them a few times.
Continuity: When Vicky and Kevin are sitting on the bed he hands her a cup of beer which is in a clear cup, but for one shot it is blue. This also happens when Stifler comes into room afterwards and the cup is in Sarah's hand. The cup goes from clear to blue and back to clear depending on the right/left camera angle.
Continuity: During the conference of the four boys at prom, there is a close-up of Kevin Myers speaking. However, in the next shot they show Oz, and in the corner is part of Kevin's face mouthing the words he had just spoken.
Crew or equipment visible: In the part where Vicki and Jessica are talking about a long distance relationship and sex, for a second a microphone is visible hanging from above.
Factual errors: In the library, the sex manual is hidden under the classification "982.1 Fluid Dynamics". Under the Dewey Decimal System, 982.1 is History of Argentina; fluid dynamics is 532.
Errors in geography: During the first lacrosse game you can see Mexican Fan palms in the background. These are the famous palms all over Beverly Hills. They are everywhere in Southern California, but do not grow in Michigan.
Continuity: While Jim, Kevin and Finch are viewing Nadia on the web cam live, the duration of "NadiaVision" remains at 0:00:19:26 throughout.
Audio/visual unsynchronized: As Stifler is walking through the party, the visual of both his slapping of a girl's butt and his snapping his fingers do not match up to the audio.
Errors made by characters (possibly deliberate errors by the filmmakers): One of the characters says Nadia is from Czechoslovakia. Czechoslovakia split into the Czech Republic and Slovakia long before this movie was made, so it was technically no longer a country.
Factual errors: In the parking lots in some scenes, cars are seen with front license plates - Michigan does not require front license plates.
Continuity: At Stifler's party Jim and Kevin start to walk down the stairs with Jim first, but by the time they reach the bottom Kevin is in front of Jim.a
Continuity: In the bedroom scene the girl is holding a clear cup full of beer. The camera goes off her and when it comes back she is holding a blue cup. The camera goes back off her then on her and the cup is clear again.
Revealing mistakes: In the opening scene, Jim's parents make references to him going to bed for the night, but daylight can be seen between the blinds in the windows.
Continuity: In the scene where Oz comes into the locker room singing, Stifler is talking to some other guys in the room, and Stifler says "This girl calls me up and asks for my number." If she called him up, wouldn't she already have his number?