When Charles Lane confronts Stephen Glass in his office after realizing that Stephen's brother was the voice of George Sims, an expletive describing the voice mail was dubbed over to preserve the film's PG-13 rating.
When Marty sits in on the editors' meeting, Caitlin is wearing a light blue sleeveless top. When the camera cuts back to the editors sitting down and checking the paper for "comma errors", she is wearing a dark blue button-up shirt with short sleeves.
At the end of the film, Stephen Glass, Chuck Lane, and their respective lawyers had a meeting to determine which of Glass's articles were fraudulent. In the DVD commentary, both director Billy Ray and the real-life Charles Lane said that the meeting happened, but only the lawyers attended.
When Stephen Glass and Michael Kelly talk about Glass's predicament, and Kelly asks Glass if he ever cooked a story when he was the New Republic's editor-in-chief, the discussion occurs at Kelly's current place of work. In the DVD commentary, director Billy Ray said that the conversation actually took place at Mike Kelly's house, and that Glass's girlfriend was present.