Other mistake: When Costigan drags a handcuffed Sullivan into the elevator, Costigan slams Sullivan against the wall and his left arm is visible and not in handcuffs. (02:13:05)
Other mistake: Near the end of the movie, after the cops storm the bank, all the cops walk into the vault, and as the camera follows them into the vault, you can hear the camera hit the metal vault door, and visibly see the camera shake from hitting it. (01:38:15)
Other mistake: Throughout the movie we see the mustang rolling chassis in the garage. This is a rolling chassis of a 1967 Shelby mustang gt 500/350. The main ways to realize this are that the car has the cut outs in the front for the 2 fog lights that the Shelby had and that the back end has a spoiler which is built into the body. However the car they do all the driving with is a base model 1967 mustang fastback. While a new grille would've covered up the fog-light cutout, the regular fastbacks didn't have the built into the body spoiler like the Shelby's did. Removing the built in spoiler and making it as smooth as it was would've taken way too much time and supplies. It also wouldn't have served any benefit. You could argue they were trying to eliminate down-force on the back but the spoiler was only about 2 inches, it wouldn't have helped. The directors did this to avoid wrecking the much more rare Shelby mustang.
Other mistake: When Bruce and Mos Def are running through the alley near the beginning, they run past a Chinese man who slams a dumpster lid shut. Once Bruce pulls out his gun to look back, that same man starts running because he gets scared. In the next shot, he continues running, but soon stops as if he thinks filming is over. This is visible right before the camera pans to the right.
Other mistake: In the scene where Mary Lynn Rajskub is driving Harrison Ford around, she is told at the beginning of the scene to "pop the clutch", signifying that she is driving a manual transmission vehicle. However, during the drive, she never removes her hands from the steering wheel to shift gears.
Other mistake: In the final scene where the police chief is barreling through the hospital on his bed, he goes along a straight path, yet when the two inspectors and the assistant come down the stairs they come out the side of the corridor. If the police chief followed a straight path, how did they come out of the side of the corridor, and how did the bed turn around a 90 degree corner at that speed?
Suggested correction: At 1:27:46 Inspector Dreyfus' hospital bed blows through a set of blue hospital doors. At 1:27:51 we see from a different angle, those same doors still partially open but swinging shut and then at 1:27:55 we see Inspector Clouseau and the others emerge from a different hallway, the blue hospital doors now shut behind them. Inspector Dreyfus' bed never made a turn as evidence by the doors. The trio though, for some reason took a different route chasing his bed.
Other mistake: After Jeff gets the key from the Rack trap room, the shotgun fires and hits the judge. He is standing with the shotgun to his right, yet he is hit on the left side of his face. There is also an inconsistency with the timing. The gun fires, then the actor turns to reveal the wound on the left side of his face. It's easier (but in no way required) to see the glaring mistake with slow motion.
Other mistake: When the assassin disguised as Hugo frees himself after being arrested, he escapes into the adjacent room, closely followed by firing FBI agents. There, he masters the remarkable task of taking off his wig, his mask, his trousers, his jacket and the bloodsoaked white shirt and stashing it all under the bed within two seconds.
Other mistake: When Ricardo is translating the email while on the ship, he chooses the origin language as English and the destination language as Spanish. But when he presses translate, it translates from Spanish to English. (01:20:20)
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.
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.