Continuity mistake: During Claire's post mortem, Doug takes a picture of her face. Her head was tilted towards the camera as were her eyes. When the picture comes out, it shows that she was faced away from the camera. (00:18:20)
Continuity mistake: When Carlin goes to the dock he gets out of the Hummer carrying a gun. The gun changes hands between shots as he is walking.
Continuity mistake: When the red Ford Bronco is driven off the ferry (ignoring all the impossible factors required for it to successfully do so), it flips through the air and contacts the water going backwards, its right/rear tail light entering the water first. The closer next shot shows the truck sink somewhat as it continues to flip backward, onto its roof. The very next shot shows the interior of the truck as it enters the water right-side up and going forward as water rushes in. Denzel lurches forward and down, driving his face into the water that is about waist level. The next exterior shot is underwater as the truck now lands in the water, nose first and right-side up. It then begins the expected slow dive, nose-first. (01:52:30)
Continuity mistake: When Clair is on the post mortem table being examined, look at her eyes. When her head is turned to the right her eyes are as well but when they turn her head to the left her eyes are left as well. Another scene shows her eyes appearing to be looking straight up. Unless her eyes were manually moved they wouldn't change positions after death. (00:18:20)
Continuity mistake: In the scene where Doug and the terrorist are talking about 'destiny', the terrorist has a tiny bit of his cigarette left. But when the camera quickly shows a shot of Doug's face and then comes back to the terrorist, his hands are almost in exactly the same place, but the cigarette is gone.
Continuity mistake: When Denzel first leaves in the hummer he is on the Westbank heading toward the CCC Bridge to the Eastbank (downtown New Orleans). Once he makes it to the bridge, he's suddenly headed back to the Westbank (away from downtown) but on the Eastbank bound span (bridges are one-way), only to exit the freeway and suddenly appear on the Eastbank and cause the accident with the 18-wheeler.
Continuity mistake: The colors of the lightbar on the ambulance stolen by Agent Carlin keep changing. Sometimes they are red and clear, other times they are red and blue (which wouldn't be allowed in Louisiana - blue is reserved for law enforcement).
Continuity mistake: When investigating Claire's apartment Doug closes the bedroom door to reveal the mural. When listening to the answerphone the door is closed. Doug makes a note, next shot both doors are wide open.
Continuity mistake: The car's inspection certificate is dated 07 2006, at the end of the movie when they drive off it's 08 2006. (00:06:28 - 01:57:57)