Deliberate mistake: After Doyle and Gavin agree to meet at the court (right before Gavin's second highway crash), there is a scene of a taxi driving on the left side of the road. This shot was obviously flipped, as everyone in the U.S. drives on the right-hand side of the road. (01:00:15)
Deliberate mistake: When Finch is attempting to turn Doyle Gipson's credit back on, one close-up focuses on the framed photo and pans out to Finch's hands on the keyboard. This shot is flipped, note his wedding band and the mouse have switched sides. (00:52:20)