When Chris and Franco are in the garage elevator, they get off on the 7th floor, but the wall on that floor indicates they're on the 5th floor.
At the first briefing at the police station, after the bank robbery, Marcus notices some red paint on the outer aspect of his right lower trouser leg and crosses his left leg over to cover this. In the next scene, he is standing with legs uncrossed, looks down and appears surprised to see something (presumably the paint), suggesting that this scene should chronologically be earlier than the leg crossing scene.
Multiple continuity errors during the fleeing car scene after the initial bank robbery. After the van's door is sheared off, dense red smoke is seen coming from the floor of the van, while in the next scene the bag from which the smoke originates is being held high out of the broken door. In the cut-scene a second later, the car comes to an abrupt stop with no smoke visible whatsoever. In the next cut, the men are shown exiting the vehicle with red smoke billowing out.
When the police interview the bank manager in the vault, there is red staining around the open door of the safe deposit box. The red smoke/dye was not released until after the robbers left the bank.
At 19:20 into the film, while the police sergeant is speaking to the detectives, Chris is looking at the floor to his left, but then in the next shot (continuous with the sarge's dialog) he is looking up at Marcus to his right.
No police unit would attempt to clear a darkened building without lights of any kind.
At the beginning credits and throughout the movie, even though the location is Atlanta, Georgia, the codes used are California Penal Code sections and West Coast police radio codes - i.e. 211 for robbery, 207 for kidnap, 415 for disturbance.
As the crew leaves the bank, Michael pulls the pins on two distraction devices (flash-bang grenades) and places them on the door handles; however, the safety levers (aka "spoons") are still on the grenades. As the crew gets in the van, there is an explosion in the bank, implying that the grenades have gone off. First, flash-bangs are mostly light and sound; they would not explode in flames and blow out windows. Second, that's not how grenades work: You pull the pin and the safety lever flies off as the primer strikes the fuse; fuse time varies but is generally under five seconds.
After Michael fires his shotgun into the ceiling, he racks the slide and ejects a spent shell, which can be heard bouncing on the tile floor. However, the sound is of an empty brass cartridge; shotgun shells are mostly plastic.
The Budapest scene in the intro is from the 'I spy' movie.
In the first sceenes during the intro a car detonates. The scene is from Budapest, Hungary. Also the license plate is in Hungarian.
About 24 minutes into the film, Russell is ambushed by an assailant putting a plastic bag over his head. But Russell's hands were free - he could have simply torn the bag with his fingers. That method of attack only works on a bound or helpless victim.
Kate Winslet's Russian name in the film is Irina Vlasov, which is actually incorrect. This is because, being a female, her last name would end with a vowel to designate that she is female, so her last name would be Vlasova, rather than Vlasov. This is common mistake in English-language films and TV series.