Continuity mistake: Toward the end of the film, Kurt Russell backs his car into an upturned car during the riots. The back right hand corner of the lights and boot lid are all screwed up. In a few scenes later, the boot lid isn't quite as screwed up and the light has magically fixed itself.
Continuity mistake: When Kurt Russell is stalking around his would-be killer's house, he loads his shotgun with 4 shells, leaving 2 left in the holder. In the next shot, there are 3 shells left in the holder and then it goes back and forth between 2 and 3 shells over the next couple of shots.
Continuity mistake: In the scene right after Bobby has shot the innocent guy he and Perry are framing for the Sidwell/Orchard crimes, the guy is laying on the ground, dead. There is a gun that Perry put near him, above his head, on the ground. In the next shot, from the point of view of the helicopter flying overhead, the gun is not there. In the next shot, it reappears.