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.

Continuity: When Nadia is in the bedroom, and Jim is using the camera to webcast her, the angle we see on his friend's computer is totally different to that on another computer we are shown.

Continuity: In the opening scene where Jim is watching the encoded TV and his mom comes in to say goodnight, after she kisses him if you look in the cracks of the shades it is light outside. It's day, not night.

Continuity: When Stifler's mom seduces Finch, you can clearly see Finch playing with the balls on the pool table. The camera cuts to another shot, and when it's back to Finch, the balls are back in the original place.

Visible crew/equipment: In the Internet scene, Jim tosses his shirt over the webcam on top of the computer so nobody will see them. It shows one shot in Jim's bedroom of the shirt start to slip off of the computer, and in the next shot is in Kevin's room seeing the shirt fall completely off. While they show the shot of the shirt falling through the computer, you can quite visibly see the hand that pulls the shirt off on the left side of the screen.

Factual error: When Jim is fooling around with Nadia, it shows a cameo appearance by Blink 182.   It's obvious that the three people in this cameo are Mark Hoppus, Tom DeLonge, and Travis Barker. Travis Barker was the replacement drummer for Blink 182, when old drummer, Scott Raynor, left. Yet in the credits, it credits Scott Raynor, the ex-drummer, as being in the cameo.

Continuity: When Nadia is going through Jim's drawer in his bedroom, a tub of Vaseline magically disappears from one shot to the next. In the same scene on top of the drawer a small white box appears at the same time the Vaseline disappears.