Continuity: The gun Frank takes from Jesse's truck is an old-fashioned six shooter, yet he fires off at least 20 rounds without reloading during the shootout at the gas station.
Continuity: Karen is wearing a slightly different top as she climbs the fence to the one she wears before and after (straps are wider).
Errors in geography: When Frank is stopped by the Texas Department of Public Safety, the officer asks for license and registration, the standard spiel for California, where the movie was written and filmed, but not in Texas, where drivers are not required to carry vehicle registration.
Factual errors: When Frank is pulled over the Trooper asks for "license and registration". In Texas registration is displayed on the windshield on the driver's side. In Texas law enforcement officers ask for license and proof of insurance during a traffic stop.