Revealing mistake: In the auditorium, when Tea Leoni is giving her speech about Pepe the mummy, Greg Kinnear (who is not visible to anyone but Ricky Gervais) starts yelling and Ricky Gervais gets up to walk away. As Greg Kinnear is yelling, an extra a few rows up turns to look at him. That shouldn't happen because the whole plot hinges on the fact that no one can see or hear these people besides Ricky Gervais.
Revealing mistake: When Angie is having her ultrasound, if you keep an eye on the monitor, you can see that the baby shows up before the doctor places the reader on Angie's stomach.
Revealing mistake: When Fish goes flying off the van, the mat on which he lands is visible. (In subsequent shots, it is gone.). (00:06:55)
Revealing mistake: When Louis is trying to get Lester to apologize to Cleo after hitting her, lots of extras on the sidewalk and across the street can be seen watching the whole scene being shot.
Revealing mistake: When they meet up for dinner (Aldous, Sarah, Peter and the hotel clerk), the restaurant host says he is sorry that they have to wait 5 minutes, and you can see that Sarah is obviously way shorter than Aldous. From the front, Sarah comes up to Aldous' eyes, but when they cut to the back, she is almost below his shoulders. Then when they start walking, she steps off a platform of some sort. They seemed to make her taller for just that frame, and then when they are walking throughout the movie, they don't seem to compensate for the difference.
Revealing mistake: The raid took place at Xmas in 1951. In homage to this fact, the characters wear big coats and one of them even rubs his hands together and goes "Brrr." Yet the movie was filmed in the height of summer. Trees in the background of scenes in London are full of leaves, we never see any mist in exhaled breath and the lighting levels and shadows indicate a high, bright sun.
Revealing mistake: During the helicopter escape scene before Tran fires the rocket at them, you can see Cody's hair showing up a bright green from the green screening. You see it several times, but most pronounced at the moment he and Portnoy see Peck arrive with the TiVo. (01:36:10)
Suggested correction: Actually it's from the overhead Plexiglas windows in the Huey. They are tinted green to cut down on sunshine. Any light shining in from above is going to make things appear green.
Revealing mistake: When Zohan brings out the pot of Hummus to put out the fire, a black hose can be seen in the background running into the pot from the right side of the screen that wasn't attached to it when it was brought out.
Revealing mistake: Jon is part of Shane's pack/tribe, but his face/image is visible in his rear view mirror when it should not have been. (00:57:00)
Revealing mistake: Throughout the Demolition Derby, most of the people in the audience are drawn without faces.
Revealing mistake: When Cohen complains about how nobody takes him seriously because he doesn't have teeth anymore, you can see a full set of teeth in his mouth.
Revealing mistake: In the opening scene, when Van Damme kicks an opponent onto the boot of a London Taxi Cab, you can see the dent from previous takes.
Revealing mistake: When Colin plays basketball he dunks the ball several times, but if you look carefully you'll notice that in some shots it's a stunt dunking for him who's taller.
Revealing mistake: When Leela brings soup to Zap and Amy in bed. Leela is wrapped up by a tentacle. The animator forgot to erase the lines of the tentacle as it overlaps. A huge graphical error can be seen.