When David and Marie park in front of Karl's wig shop, his name is misspelled on the lettering as "Karl Gualt Fine Wigs".
During the fight scene at the carnival, the stuntman for Robert Redford's character can be seen as he has a different hairstyle, and appears to be older than Redford. Ronnie Rondell Jr., who plays the teenager, is doing his own stunts, as he was a professional stuntman as well as an actor.
After Marie stabs Karl she runs outside and hails a cab to go to the courthouse but has no purse on her and her dress has no pockets. When they get there the cab driver offers Marie her change, so where did she get the money to pay in the first place.