During the final action scene, the constant shots of the sun rising clearly emphasize that it is dawn. Yet when the actors leave the burning house, their shadows are directly below them indicating that it is noon time.
When they are driving through the desert and Sean asks him to throw the beer can out, when he tosses it you can clearly see it is crumpled, but when it hits the cops car its still a smooth can and rolls right off the hood.
At about 48 minutes, the vampires' Charger has both its regular beams and its high beams on. When they cut to it a second later, only the regular beams are on.
The Texas highway patrolman asks for "license and registration." Non-commercial vehicles are not required to carry registration in Texas, so law enforcement officers would never ask for it.
The fire gel is clearly visible on the man's pants when the fire reaches him.
When Sean is driving down the desert highway the camera truck passes on the left of the Mercedes he is driving and is reflected on the body of the car.