During the jury selection montage the judge says 'Enter Lydia Deets as a juror.' Moments later, her profile is shown on screen and the lawyers accept her and the judge says 'Enter Miss Deets as a juror.' she has been entered into the list twice.
When Dustin Hoffman and Gene Hackman have their showdown in the lavatory towards the end, Hackman greets him and says that this is a "long overdue pleasure." This is a reference to the fact that this scene is the first scene ever between Hoffman and Hackman, two former classmates at film school, in their substantial screen careers. Despite being in the industry for decades, and being long-time friends, they had never made a movie together.