When Gray is replaying the Pelican Brief recording, at the end he turns off the recorder according to the sound of Darby not talking anymore. The recorder button is already shown as off and he pushes the play button. This shot should have been shown at the beginning of his recap.
After the action that follows Darby Shaw retrieving the contents of the safe-deposit box from the bank, Gray Grantham's boss is told that there was a car explosion in the parking lot near the bank, and it involved the car was that rented by Grantham. However the car-bomb did not detonate, and it would be an amazing coincidence if the assassin chasing Shaw and Grantham just happened to crash into that specific car. In fact, we saw them run from the car and then jump down a level in the parking lot before going from level G6 to level G4, so the crash didn't even take place where they had parked.
After Gray finishes taking pictures of "Garcia" through the open window of his car, he puts the camera down on the front seat and gets out of the car to follow "Garcia", but he doesn't wind the window up, leaving his expensive camera at the mercy of any casual thief.
Darby and Gray are in the car after retrieving the video tape from the bank and are being watched by the villain that planted the bomb. After Darby senses the car bomb, they go on the run and rapidly climb up several levels in the parking garage. As they emerge from the staircase the villain that watched them from several levels below, comes racing toward them from the garage level above. It would be impossible to move a car around the garage fast enough to get above them.
When Darby flees from the scene of Thomas's murder and first enters the hotel room where she's going to hide, you can see the imprint of someone who has been sitting on the foot of the bed (presumably Julia Roberts from the previous shoot of the scene).
Gavin Verheek tells Darby by phone that he is staying at the Westin, by the river. Darby later tells him to take the trolley to a place called the Riverwalk. In reality, the Westin was approximately 1 block from the Riverwalk. The nearest stop to the Westin where Gavin could have caught the riverside trolley (streetcar) was at the Riverwalk.
In the videotape the oil and gas lawyer Curtis Morgan leaves
for his wife, he says that he lifted an incriminating memo from the desk of a lawyer at White and Blazovitch dated September 28th. But when Gray Grantham calls around confirming the facts before running the story on the memo, he says it was dated April 11th.
When Darby is finished with the safe deposit box, she closes and locks its door with her key, removes the key, and leaves the vault. But safe deposit boxes cannot be locked or unlocked with only one key. Two keys are needed. Darby's key would have to be paired with a bank's master key. Usually a bank teller is present to do the 2-key locking procedure.
When Khamel is chasing Gray and Darby with a car in the parking garage, while they are on foot, he fails to gain significant ground on them despite seemingly flooring the car and reaching a speed fast enough for the car to explode upon impact.
The goof item below may give away important plot points.
During the interview in the final scene of the film, Gray is asked whether or not Darby Shaw was a real person or whether she was simply a figment of his imagination. The interviewer suggests that many people believe that Darby Shaw was invented or simply Gray's pseudonym. However, it would not seem too difficult for a major news network to track her down. She was a law student with friends and acquaintances, numerous people knew that she had been associated with men who had been killed in response to her brief and the justice killings, and she had been included in a police report for a fatal car bombing which would have had to have been well-reported in New Orleans. With these leads and her name included in Gray's article, it would not have been difficult for reporters employed by a nationwide news program to track down Shaw's identity.