(at around 22 mins) When MacPherson is getting a ride from the day worker, the truck is loaded with lumber, etc and the tailgate is open when he picks him up again after making a stop at the job site. Then after a cut the truck's tailgate is closed. Then after another cut when they get close to the address MacPherson is seeking, the tailgate is open again with the lumber sticking out.
(at around 34 mins) In the flashback when MacPherson gives the copy of Watership Down to Miguel, it's signed "Thanks, McPherson", instead of "Thanks, MacPherson".
(at around 36 mins) When Joanna comes into the diner she sets down her purse next to her. She leaves and walks past her purse on the counter.
In the film, MacPherson is an ABOVE knee amputee, but the prosthesis that is shown on numerous occasions is for a BELOW knee amputee.
When MacPherson rolls the sheriff's department SUV slowly through the street, the officers and armed citizens fire at the vehicle passing between them, creating a deadly crossfire that would have resulted in them killing each other.