Continuity mistake: Kevin Shepherd pulls over in front of her fiancee's dad. It's still a wide angle, but you can see distinctly both her and his left arm stretched forward; she is looking at her engagement ring, he has his hand on the steering wheel. Before the camera cuts away though, he lowers his arm; it is not acknowledged in the new shot, where both have still their left arm forward. (00:03:35)
Continuity mistake: Throughout the film, Nicole Kidman's hair changes color. In one particular dinner scene, her hair is everything from light blonde, to dark blonde, to red.
Continuity mistake: When the plane is on the ground, it has two engines. When it takes off, it has four.
Continuity mistake: During the sniper shooting of Adrien Brody, you have both brothers standing outside of the bank door in the pouring rain. The rain is visible during this scene, but after the sniper shoots the suspect in the head and the Brody falls to the ground, during the closeup when the police move in, there's no rain drops on Brody. Hayden Christensen is still standing up with rain falling around him.
Continuity mistake: As the two assistant workers walk away from the prison building at the end of the first day, Charlotte Gainsbourg's grip on her folders switches between shots.
Continuity mistake: During the car chase, the white jeep goes from damaged to undamaged between shots. (01:08:00 - 01:09:00)
Continuity mistake: When Michael Keaton goes to his dressing room following the light accident, the note on the flowers changes. It first reads: "They didn't have the whatever you wanted." After he removes his headpiece, the note reads: "THEy didn't have whatever you wanted - SAM."
Continuity mistake: Stretch takes the licence plate off the limo just before it's stolen. When he's clinging onto the bumper as it's being towed, the plate is back on.
Continuity mistake: When Elizabeth Banks is getting out of Amos' car, when they get back from Bible study, from Banks' angle, you can see that his hand is on the knob on the steering wheel, whereas when the camera changes to Amos' angle, he isn't touching the knob. When the camera changes back to Banks, you can see his hand back on the knob. (00:48:10)
Continuity mistake: During the knife fight at the end, the position of Lance's hands on the German officer is changing instantly. (01:14:50)
Continuity mistake: The protagonist just unveiled to his boss the "nest" ad, to which he suggests some not-so-minor changes. Luca Argentero is holding the drape in two very different ways between shots (first with bunched cloth sticking up top, then simply folded). (00:05:00)
Continuity mistake: When April shoots the alien, they all go outside to look at it. Behind them, you can see the windows boarded up, but they don't board them up until later in the movie.