Continuity mistake: During the banquet, Semyon motions to the waiter that offers to pour him champagne, to serve the guest to his right instead. The bottle was showing the label to the camera, but in the new shot it made a 180° turn, the label faces the waiter instead. Moreover, the waiter exits left but is walking right behind Semyon right a split second later in the reaction shot as Semyon looks at his son answer the phone. (00:15:10)
Revealing mistake: The overhead shot of Grohman climbing down the mountain features an alpine stuntman wearing gloves, while at no point Mario Adorf was shown wearing any. (00:50:20)
Continuity mistake: After Redmond is killed, when the flashback starts, Leonard's back is to the main door of the cabin. When the flashback is over, his back is to the kitchen.
Character mistake: At the truck stop, Mark (young Damian) meets with Martin. Martin tells Mark that he had the shedding pills reverse engineered and hands him a piece of paper. The percentages of the 5 ingredients only add up to 90% rather than 100%. (01:29:25)
Continuity mistake: When Hoffman wants the envelopes, Jill's collar is turned up. Camera changes and it's lying flat. (00:20:25)
Continuity mistake: When Lisa and Naoko discuss at the park just after Rose asked Lisa if she could go to the swings, Naoko tucks her hair behind her left ear. In the next shot, her hair is back in front of her ear. (00:51:40)
Visible crew/equipment: In the scene near the start of the movie when Lois Chiles is showing Mia Farrow her bathroom and Mia Farrow is saying "Yes, It's lovely," on the mirror on the right you can see a member of the crew crawling around on his hands and knees. This is visible on the DVD as well as at the cinema. (00:05:50)
Continuity mistake: When Renée Zellweger drives up in front of her house the first time in the movie, as she shuts her car off, her window is down. When she gets out, the window is back up.
Continuity mistake: The roof of the Chessman House changes, going from having a middle roof to no roof in the middle.
Continuity mistake: When Jessica finds the gift box of roses outside her apartment, there's a closeup of the card signed "Ray", then a few shots later in the next closeup of the card the signature "Ray" is entirely different. (00:56:00)
Continuity mistake: After Ben Tramer gets hit by the police car, his body can be seen and heard slumping. In the next shot, he is pinned fully upright.
Continuity mistake: When Mrs. Hallet goes to retrieve the rubber seals from the cellar, she opens the trap door and the diagonal wood creates "Z" bracing; but in the next shot, as Hallet heads down the stairs, the diagonal wood cross brace is now attached to the door in the opposite direction, making a backwards "Z" bracing. None are flipped shots. (00:27:30)
Factual error: The solar panels (or mirrors) are facing away from the sun. The sun's position can be estimated from ground shadows and object highlights and the panels are facing in completely the wrong direction. (01:11:40)
Continuity mistake: In Madrid Bourne calls the emergency line and says he's in 334 Norte street, which triggers cops to show up. When Bourne arrived at the building he looked at the door and it was a 2 digit number which one can faintly see it starts with a 1. (The filming location took place at number 10 Virgen de los Peligros street).