Audio problem: When Judge Dread and Rob Schneider are running to escape from oncoming guards they are stopped by one guard right before they leave on the motorcycle. The guard says "I knew it was you Dredd." The camera focuses on him before he is done saying that but his mouth is not moving.
Audio problem: Just before Junior Angel shoot a missile on the prisoner's ship, he says something like "Gonna get me some city boys", but his lips don't move.
Audio problem: As he's walking through headquarters to get Rico, Dredd is unmasked by another judge. You hear the the guy say "I though it was you!" but his mouth doesn't move.
Answer: She is not. The judges have unisex locker rooms. Later in the movie when another female judge opens a locker, a male is in the background wearing a towel, which shows they all share the same locker room.
Twotall