Continuity mistake: The scene in the film that follows Berstein's interview with the book-keeper, where he is getting all his notes on various bits of paper out of his pockets: there is a Life magazine on the desk in front of Woodward's typewriter. At the start of the shot where Berstein says: "Mitchell, she said something about Mitchell." the mag has gone, then it reappears and disappears randomly in the subsequent shots in this scene.
Trivia: According to an interview with Robert Redford, filming was attempted in the actual Washington Post newsroom, but turned out to be impossible because many too many employees were aware of the camera, and some even tried to act. In fact, some employees would disappear and apply make up. They eventually had top spend almost $500,000 to recreate the newsroom on the studio lot.