Revealing mistake: When Dekker follows Richards on a motorbike he drives through a glass door with wooden frame. The class shatters noticeably (about a half second) before the bike even touches the door.
Continuity mistake: When Shane is interrogating Harry, there is a flashback to the Pearl Street Bridge. In the first shot, we see York standing next to Conners. In the next shot, Conners is standing alone and in the very next shot York steps up next to him.
Factual error: A helicopter flying over the bank can be seen to have a Canadian registration number (beginning with C). A Seattle news or police helicopter would actually have an American registration number (beginning with N).