Continuity mistake: There are a number of scenes (stable house, car, hotel) showing Claudia wearing a green harness dress. It is quite obvious that she is not wearing a brassiere in all of those scenes. In the hotel room, where Foxy and Claudia meet the judges, Claudia removes the green dress and is now wearing a bra. It would be highly unlikely that she would be putting one on, at the same time she is getting undressed. This was obviously done to cut down on nudity in the film.
Revealing mistake: When Jackie shoots her brother's left ear, there is a hole punched into the wall, behind him. We should be able to see into the hole, but we can't because the angle of the hole into the wallboard is wrong. From where Jackie took her shot, the bullet should be angled similarly to the (extra bright) light and the camera angle (our POV), but, instead, it goes perpendicularly into the wallboard.