Crew or equipment visible: When Michelle calls Jim's dad into her room to help with her vows, they sit down together. A crew member can be seen in the mirror behind Jim's dad.
Continuity: After people find that Stifler ruined the flowers, Jim and Michelle walk through a door. Before they walk through, Jim is wearing his jacket, and on the other side, Michelle is wearing it.
Crew or equipment visible: When Finch and Michelle are at the airport, Finch goes into the bathroom and the camera is reflected in the mirror.
Crew or equipment visible: When Jim and his dad talk about vows and sex, the camera, cameraman and lights used to film the scene are reflected in the television behind them.
Continuity: When the strippers and gay guy are arriving at Jim's house, it is dark outside. When the bride's parents arrive, daylight can be seen through the curtains.
Continuity: When Michelle's grandmother's wedding band is dropped and picked up again, it is clearly a different ring.
Continuity: Finch reaches for Michelle's wedding ring twice.
Miscellaneous: When Stifler picks up the dog poop with the paper, there are grass clippings on it. When they show it later, it is grass free.
Audio/visual unsynchronized: As Michelle's parents are arriving at the bachelor party, Finch cries out "Stifler", but his mouth does not match the word.
Errors in geography: When Stifler gets to the party, there is a palm tree behind the house in the background.
Continuity: The amount of suds on Finch's head in the last scene changes between shots.
Continuity: During the bachelor party when the cop stripper is trying to get Finch to touch her, her jacket is off, in the next shot after she gets angry with Stiffler for touching her, her coat is on and she removes it again.
Errors in geography: The wedding is supposed to take place in Traverse City, Michigan. There are no rocky cliffs on the coastline in Traverse City, Michigan only sandy beaches and sand dunes.
Audio/visual unsynchronized: Though shot in 2003, the Chicago nighttime fly-by for the trip to find the dressmaker was most likely taken from stock film shot in between 1996-'98. The Stone Container Building (the diamond topped building) has a red border sporting "Go Bulls", something that hasn't been done since that championship time period.
Audio/visual unsynchronized: In the scene right after the pubic hair is shaved, they show Jim throwing the hair out the window. Follow the hair follicles down the side of the building until the window is out of shot. There is a pretty bad jump cut here.
Audio/visual unsynchronized: In the scene with Stifler and the cake that says 'Congratulations Jim', after Stifler is on the ground and Jim is trying to get the first dog off Stifler, the second dog comes in. Just before the second dog gets to Jim's leg you can see a cut shot, sort of hidden with a morphing transition. If you pause at the right spot, you can see two little dogs.
Miscellaneous: When Finch is in the kitchen by the fridge he sets the whipped cream on the counter and is rubbing the chocolate on his body and then "magically" the whipped cream is on his body without him picking up the bottle.
Factual errors: Ventilation fans extract air from inside the building to the outside, not the opposite as is shown when Jim throws his hair out of the window.
Continuity: In the cake scene, Jim turns into Stifler totally crushing the cake, however when the dogs arrive and are waiting at the end of the corridor, the following shot of Stifler holding the cake shows its not been crushed and is intact.
Plot holes: In all the time that Jim and Michelle have been together, why was he surprised that Michelle had a sister?