Other mistake: When Wrangler is first seen, he is shown autographing tickets by driving over them. There is a tyre mark shown on the tickets when he first does it, but a few minutes later, when he autographs Cruise's tickets, there's no tyre mark on the tickets, even though he used the same method. Also, when Lugnut shows the tickets to the police car at the end, the tyre marks have now appeared. (00:08:05 - 00:11:15)
Other mistake: During the car chase in the tunnel you can see the driver wearing a helmet in 2 shots.
Other mistake: When Minister Hempf pulls up in his car beside Sieland, he talks to her, however the windows of the car are rolled up.
Other mistake: When the ship first turns upside down, power is lost throughout the ship and emergency lighting takes over. Yet shortly after, people are being severely electrocuted in the Disco.
Suggested correction: The lights went out because the power cables connecting them to their power supply were severed. Just like a downed power line in a town without power, there is still an electric current traveling through these lines, but the lights go out because they are no longer connected to that power supply.
That's not true. The ship, when upside down, suffered a blackout, since the engines that drive the generators cannot run upside down. The only power source available then are the ship's batteries, which certainly can't and don't provide the amount of voltage that apparently still coursed through the line in the disco. It should've been dead, like everything else on the ship not connected to an emergency power source.
Other mistake: When Jenny and Matt first enter his apartment, the deadbolt on the door is intact. Later, when Professor Bedlam's minion kicks the door open the plate and deadlatch are missing. The act of kicking the door open might destroy the striker plate in the door jamb, or it might blow the entire lock body through the door, but it couldn't neatly remove the plate and bolt alone.
Other mistake: When Malus is talking to the female cop about the station wagon crash, he asks her who the woman and child were, even after she has told him that there are no bodies to identify, and no car registration.
Other mistake: At New York ATC, the radar shows American Airlines Flight 11 disappearing over Manhattan, indicating that it has just crashed into the North Tower. This occurred at 8:46 a.m. Around a minute and a half later, Sgt. Jeremy Powell at NEADS directs the scrambling of fighter jets in search of American 11. He states that the time is "0846" (meaning 8:46) - should be 0847. (00:34:55 - 00:36:17)
Other mistake: Why are the guards carrying that useless glass armor? Glass is very heavy, so it is not comfortable; the armor isn't shock proof, because it breaks even if they just fall down; and it isn't bullet proof, because the guy with the AR-15 shoots right through it.
Other mistake: Luke shoots Jasper's finger off, but if you look closely, you can see the bullet only hit his wrist.
Other mistake: In the standoff in the bar, Robert Patrick fires about 22 rounds from his handgun, then runs outside without reloading and fires even more into the propane tank under the bar. No way his gun holds that many bullets.
Other mistake: The boy fires a bullet on the right side of the bus, but she is shot by a bullet entering through a window on the left side where they were sitting.
Other mistake: The girls are invited to the cool party where the cool kids go. They are discussing it in the hallway, pitching a non-existent boat party. Throughout the scene, extras just keep walking back and forth to make the space look like a busy school. A guy with a loud green Hawaiian shirt carrying a clipboard is particularly noticeable. (00:02:30)
Other mistake: François Cluzet and Marie-Josée Croze are husband and wife who grew up together and have been in love with each other since they were kids. They are shown in flashback scenes when they are kids as obviously being the same age. Yet it is obvious to the viewer that Cluzet is at least a generation older than Croze (15 years to be exact when I checked on IMDB.com) in the time that the actual story takes place in the present.