Continuity: On the back of Nadia's postcard from Philadelphia the caption reads "The Pricklypear Cactus", not the Liberty Bell, as pictured on the front.
Continuity: The flowerpot that falls, reappears and then disappears.
Revealing mistakes: You can see Jim's shorts when he is supposed to be naked with the girl at the beginning of the movie.
Crew or equipment visible: In the final shot of the film the crew is reflected in the truck door.
Continuity: The position of the dildo in Stifler's hand when he's running down the stairs.
Continuity: The cards on the table disappear during the cop scene at the first party
Continuity: At Stifler's party, when the Jim, Finch, Kevin, and Oz are sitting at the table, they are playing cards. There is a pile of cards in the middle of the table, but when the cops come inside to bust up the party, the camera flashes back to the table and the cards are gone.
Continuity: When Finch is hanging the pictures of him Stifler and Stifler's mom they are one way then when he takes them down they are in a different order.
Continuity: When John begins peeing over the balcony the first shot of it hitting the patio chair show a water stain, even though the chair is apparently water repellent. In subsequent shots the stain is gone.
Crew or equipment visible: When the guys are arriving at the beach house with the truck for the very first time the crew is reflected in the pick-up.
Crew or equipment visible: When the guys enter the town for the first time, in the shop window reflections, you can clearly see in some shots that the pick up truck is strapped to a trailer and being towed, as well as having a camera crew on it.
Continuity: When Jim is squirting "lubricant" on his hands and rubbing them together, the TV remote is on his stomach. In the next shot, the remote is gone.
Audio/visual unsynchronized: When Nadia is talking the Sherman she sets her Pepsi can down and the sound effect is that of a bottle being put down.
Continuity: When Stifler throws the football at the girls on the beach and Oz dives into them, the 2 liter of Pepsi is half full and upright. Before he falls, the bottle is crushed and to his side. He never touches it.
Errors in geography: The plants in the movie do not grow in Michigan. They all are planted species in Southern California.
Errors in geography: Downtown Grant Harbor is actually downtown Seal Beach, California. The trees on the street do not grow in Michigan.
Errors in geography: When the guys get done driving through downtown "Grant Harbor" they take a left and you can see a huge pier sticking out into "Lake Michigan." There are no large piers in Lake Michigan that look like this, a typical Southern California ocean pier.
Errors in geography: At the beach house, the waves in "Lake Michigan" are too large for it to be the real Lake Michigan on a sunny calm day.
Errors in geography: During the scene on the beach with Viki you can see the Southern California coastline behind her. Michgan does have some hilly coasts, but nothing that big and dry.
Continuity: During the scene with the 'Lesbians', Amber pulls down her bra to her waist. A few shots later, she pulls her bra back up again. In the very next shot her bra is round her waist again, and in the next shot it's on her chest again.
Continuity: When Kevin is telling the guys about him and Vickie, whilst sat on the rocks near the end of the film. The wide and close up shots of all characters besides Kevin show there backs to the water, but then the close up shot of Kevin shows the sea behind him.
Continuity: At the scene when Stifler opens the champaign for the girl he's with, the Chinese man starts urinating on the chair, the next shot there is no visible stain of where he urinated.