Continuity mistake: When Ben Stiller goes to the girl's house in the white suit - she slams his head into the wall and a blood/makeup stain shows up...when the camera angle changes the stain is gone.
Continuity mistake: During the final game when Justin is by himself, you can see Owen sitting on the bench without his track suit. When he throws the ball at White you can quickly see in the background Owen is standing behind Justin with his track suit on. Few shots later it cuts back to the bench and he is sitting down with the rest of the team with the uniform minus the track suit.
Continuity mistake: When the guys are all sitting around (after the car wash) they are throwing ideas to save the gym. In one shot Gordon pulls his magazine out of his bag, but a split second later in a closer shot he pulls the magazine out again.
Continuity mistake: When Peter first leaves his house near the beginning of the movie, he throws his empty bottle at a lawn chair, and it bounces off onto the ground. In the next shot, when he drives away, you can see nothing on the ground and what looks like the bottle now lying on the chair.
Continuity mistake: When Martha Johnstone falls on Justin during the cheerleading tryouts, her skirt falls up and is laying on her back; they show this in a front view; but when they switch to a side view, her skirt is back down covering her bottom.
Continuity mistake: In the scene when Gordon gets angry seeing his "mail order wife" with another man you can see the dancers in the background, behind Gordon, just standing around. When the camera pans out they are all dancing and celebrating. When it cuts back to Gordon they are just standing and leaning against the pole.
Continuity mistake: When Average Joe's team are running to the balls against Skillz That Kill, you see the Lumberjack's feet instead.
Continuity mistake: When White pushes the waitress into the table at the Dirty Sanchez, she takes the tray with her as she stands up and walks away. In the next shot, Gordon moves the tray off the table.
Continuity mistake: In the first scene that Vince Vaughn goes to global gym to confront Goodman, Vince and Ben are talking to each other. During the conversation, you can see a woman working out on a fitness machine behind Vince. When the shot widens as they are leaving, neither the machine nor the woman is there.
Continuity mistake: When White and Peter are going back and forth at each other in the Dirty Sanchez, White's "G" charm around his neck keeps going from forwards to backwards from shot to shot.
Continuity mistake: When Gordon is talking to Peter about the OSQ magazine about midget tossing, right before Gordon hands him the magazine, Peter has an orange juice carton in his hand. In the next shot you see him holding the magazine with both hands empty, with not enough time to get rid of the orange juice.
Continuity mistake: When Peter La Fleur is presented with a contract to sign his gym over and Me'Shell opens the briefcase to "Show" the $100,000.00 the money appears in the middle of the briefcase, however, when the camera angle is changed so you see the back of White's head you cannot see a trace of the money in the briefcase.
Continuity mistake: When Peter walks into Average Joe's in the beginning you see Owen leaning over the counter reading. His hair is parted to the right and has spots where you can see his forehead (it's grouped). But in each shot where it focuses back to Owen his hair is different each time, sometimes combed nicely with no empty spots.