Continuity mistake: When they are looking at prospective husbands, Princess Mia and Lilly are eating popcorn and Lilly asks if it tastes like pears. Princess Mia answers its a "Genovian specialty," and the popcorn disappears immediately afterwards. (00:25:45)
Continuity mistake: As Christine and Raoul race up the stairs of the Opera House, her hair is loose. By the time they come out onto the rooftop, it's partially pulled back in an elaborate fashion. She's never off screen long enough to have done that. (01:05:35 - 01:07:05)
Revealing mistake: When Ajax slams the hammer end of his spear into a man, he has his shield at his back. The top arrow in the shield is bent at a 90° angle and as Ajax moves the top (plastic) arrow droops down and the bottom arrow actually flops around. While still in the same location, when he sticks his spear into the sand and pulls the arrow out of his thigh, the arrows on his shield are gone. (00:42:20)
Visible crew/equipment: In the Jaguar, after Ed explains that he already adjusted the seat and Shaun shouts, "Careful!," when Ed pulls out of the driveway a seated crewmember is reflected on the side of the car. This does not refer to the zombie extras. (00:45:15)
Continuity mistake: When Ben Stiller appears at the fight scene, there are six people behind him on the staircase. When the shot shifts to Ben Stiller and his crew joining the circle, only five people are behind him. (00:59:20)
Continuity mistake: When Napoleon throws the fruit on Uncle Rico's van, it hits the windshield and leaves only splatters of juice on the windshield, but when Rico stops the van, the windshield has several chunks of the fruit on it.
Continuity mistake: In the scene where the two sets of parents meet for the first time on the island, Bernie hugs Greg leaving his sweat mark on Greg's shirt which also looks wrinkled. This changes to there being no wetness at all, some wetness and then very wet again in between shots of him. When he enters the house, his t-shirt is totally smooth and dry. (00:21:25 - 00:23:20)
Continuity mistake: When Jenna first walks around after turning 30, the camera pans around the apartment and we get a good view of the small glass table in the lounge, and there is a remote control next to a magazine. When Jenna goes and sits on the yellow chair though, the remote is now on the magazine. Later when Jenna is throwing her letters, the remote has moved to its original place. (00:13:30 - 00:14:45)
Visible crew/equipment: When Kelly bursts into the classroom and pulls the main character out of the chair there is a shot of them from behind as they leave. There you can see the battery pack on the back of the main characters pants. (00:59:00)
Continuity mistake: When Carter is splashed as the twins jump into the pool, only one side of his head/hair is wet. In the next shot, all of his hair is wet. (00:56:50)
Continuity mistake: During Noah and Allie's first date, when Noah decides to lie down in the street, his head is lined up with the double yellow center line on the road. When Allie decides to try it, Noah has moved to nearly the middle of the right lane. (00:15:00)
Continuity mistake: When Jack first meets Maya and they are all having a drink at the bar, Maya is holding a cigarette. We can see she is holding the cigarette up near her face when the camera shows her from behind but is all of a sudden holding it near the bar counter in shots of her face. This continues until about halfway through the scene.
Continuity mistake: Celine is opening her apartment door. The door-handle is on the left side. When they walk in and close the door, the door-handle inside is again on the left side. (01:08:25)
Continuity mistake: In a couple of close up head shots of Paul Bettany in the final match, the tag in his shirt is visible. In one shot the size of the t-shirt is L (large), in a later shot within the same scene it says M (medium).
Continuity mistake: When Viktor and Amelia are having dinner in the terminal, Enrique fills her glass very full. However, in the shots with only Amelia, the wine level changes to be significantly lower, though she never touches the glass. (01:26:00)