Continuity mistake: Parker filled a beer pitcher and there was very little foam. After leaving from behind the bar, the beer pitcher was half foam. (00:20:50)
Continuity mistake: Towards the end of the movie, during the shoot-out in the cave system, she picks up a shotgun which then magically changes to a sniper rifle with a scope on it.
Continuity mistake: When Parker fills a pitcher of beer from the tap, the beer has a good-sized head of foam. Parker takes a few steps and the pitcher has virtually no foam. After a few more steps, the full head of foam has returned.
Continuity mistake: Early in the film, Parker travels to her hometown in a terrible rain storm. She arrives at the Sheriff's office soaking wet, and after a brief meeting, the Sheriff drives her home - in bright sunshine.