Check out the seen where "the enemy" is in the bathtub going over his notes. Penny Lane walks in to the bathroom to do her business, and "the enemy" jumps out of the bathtub in disbelief, knocking all of the papers on the edge of the bathtub on the floor. In the next scene where he is standing up talking to Penny, look in the background; all of the papers are back on the edge of the bathtub. Pretty noticeable slip-up if you ask me.