Nick and Marlee meet in a voodoo shop where the Creole shopkeeper only speaks French. The movie conveys the image of the City still being mostly French speaking, but the French-only speaking Creole population in New Orleans is practically extinct.
A witness testifies that the Esplanade Mall would never be robbed because a police station is right across the street. This is wrong. There is no Jefferson Parish police station near the Esplanade Mall.
As the funds are being received at the Cayman Island Bank, the issuing bank name and address is filled in as "Cayman Islands Reserve Bank", however the printout of the transfer has issuing bank name and address as "Bahamian Reserver Bank" in Nassau, Bahamas.
When Nick is scribbling on the jury menu form, rain is seen outside the window. When he throws the form outside a few minutes later and it's picked up by Marlee, the rain has stopped and the grass is dry.
In the first scene when the defense and plaintiff first walk into the courtroom, the defense sets the rigged briefcase on the table as he walks to the table. In the very next shot they show a close-up of him setting the briefcase in place from a sitting position.
In Nick's first scene he opens a piece of mail at his apartment's mailbox. It is addressed to him at "1619 Chartres St." Later, when his info is brought up on Rankin Fitch's computer screen his address is listed as "617 Chartres St."
When Nick attacks Fitch's man in the car he swings and smashes the windshield and passenger side window. As the man backs up, the rear window is intact but as he pulls away the rear window is shattered long before Nick throws the pipe at the back of the car.
When Rankin Fitch meets the gun company guy who is shooting clay pigeons, near the end of the conversation, the gun company guy starts to put on his safety glasses and says "Pull" before he has time to shoot, but in the next shot, he is fully prepared, and hits the target in the air.
When Fitch meets with the gun company man who is shooting clay discs, near the end of the conversation the man loads his gun and closes it. In the very next shot it's broken open then switches back to closed in the shot after that.
When Fitch meets the gun company men, a chessboard is shown. The game is already started (the white Queen and the white King are in wrong start position). In the next shots, after some seconds, the chessboard shows the chess pieces in the start position (and the white Queen is finally in the correct square).
When the menus for the jury's lunch are being handed out, the policewoman enters the room with a stack of menus in her hand and she just starts distributing them. In the next shot, it is shown that everyone in the room has their own menus in their hands. How did she distribute them within one second to everyone?
When Nick Easter meets Fitch they meet at the Riverwalk near the Crescent City Connection bridge in New Orleans. The jury is sequestered near the Texas border according to one juror's comment when they arrive at the motel for the jurors.
The American Flag is on the wrong side of Judge Harkin, as it is accorded the place of honor, always positioned to its own right, or the speaker's right and the audience's left, according to the United States Flag Code.
After the anti-gun juror goes on his tirade, Nick Easter makes a joke. In reality, a tirade like that could actually force the judge to dismiss the entire perspective pool, because the pool would then be considered tainted since the witnessed the tirade.
When Fitch is viewing a video of Nick, we see it paused with embedded timecode paused along with the video. the last two numbers (:39) indicate the frames, not seconds (you can tell this by the speed at which the numbers run and the fact the "tens" number never passes 3) when in play mode. Frame rates for NTSC (north American video) is 30 frames per second, anywhere else in the world it varies, mostly at 25 frames/sec in most of Europe, but no video is more than 30 frames/sec.
Near the end of the movie, when Doyle is driving a car and talking to Fitch on his cell phone, the antenna is shown in the extended position, but then is retracted by the time he finishes the call and hangs up.