Continuity mistake: The first time we see Juliette Lewis she is being checked out by the doctor. In this scene there are 2 camera angles, one looking at her from the front and the other behind her. When cutting from one shot to the next her hair changes from being hooked behind the ear to falling over it.
Revealing mistake: Towards the end of the film, when Parker and Longbaugh are coming to get Robin, they get in a small (by comparison to the end of the film) gunfight with Jeffers and the unnamed pimp. During the gunfight, Longbaugh empties two magazines through his 7.62 Galil trying to get Jeffers through the wall. However, the guy setting up the squibs must have been short of creativity, because the resulting yardstick straight line of holes would be virtually impossible to make with a 7.62 on full auto.
Continuity mistake: Towards the beginning, when Mr. Parker and Mr. Longbaugh kidnap the woman at the hospital, when the black body guard passes her to get in front of her, he is pulling back his shirt, reaching for his gun. A second later, they show both body guards reaching at the same time.