Factual error: The movie takes place during the 1990s, but throughout the movie cars are shown with Illinois license plates with "Illinois" written in cursive. These plates were not introduced until 2001. (00:24:45)
Continuity mistake: During the opening credits, Mark Whitacre is writing with his left hand. Later in the film, he's writing with his right. There is no indication that he is ambidextrous, which would properly explain this mistake.