Vetter's Dodge truck clearly blocks Jack's Porsche preventing him from leaving, although later in the scene it is backed up giving plenty of room for Jack to leave.
When Sean and his group get in the silver car to leave the plane hanger, the car has a temporary license sticker in its rear window. When the car pulls out of the hanger, the temporary sticker is gone and there is a proper license plate where one should be.
When Sean is questioning Overdose on the front porch Overdose's necklace disappears and reappears between shots.
When he wakes up in the hospital, he has been there for quite sometime because they had already buried his wife. It looks as if his white socks are dirty, which means he was walking in them recently.
The rear view mirror has been removed from the white Chevy Caprice taxi.
When Vetter goes into Lucero's cell and lights his cigarette, we hear the clink of a zippo-style lighter, but see a flame that is obviously that of a disposable lighter.
Shadow of Camera is visible on Memo Lucero's taxi towards the beginning of the film.
As Sean starts up the stairs to the 2nd floor of the old cantina towards the end of the film, you can see a crew member moving a light reflector in a mirror on the left side of the frame. This is fully visible in the widescreen print, but appears only as a moving light in the full screen print.