Other mistake: The shot before Dredd tells Anderson the terms of the assessment is flipped: you can tell because the judges walking in the corridor have their badges pinned to the right side: with every other judge in every scene of the movie, it's on the left side. (00:10:25)
Dredd (2012)
1 other mistake
Directed by: Pete Travis
Starring: Lena Headey, Karl Urban, Olivia Thirlby, Andile Mngadi, Porteus Xandau, Rachel Wood
Continuity mistake: The right side of Anderson's face is alternatively in the dark or well-lit when she rings the bell to Kathy's flat. (00:37:20)
Dredd: Been wondering when you'd remember you left your helmet behind.
Anderson: Sir, a helmet can interfere with my psychic abilities.
Dredd: Think a bullet might interfere with them more.
More trivia for Dredd
Question: Why doesn't Kay kill Anderson after he grabs her and takes the elevator up to Ma-Ma? Or at least, why doesn't Ma-Ma kill her when Kay comes in with her? They were intent on killing the Judges and didn't care about the consequences. So what was Ma-Ma hoping to accomplish having her as a hostage that she couldn't try to accomplish without one? At this point, she already had the 4 crooked Judges on their way.
Answer: Kay wanted to punish her for what she did to him earlier. Ma-Ma wanted leverage against Dredd should he get past her Judges.
MasterOfAll