When Stanley and his wife were attacked at the airport parking garage the men were shown getting out of a Monte Carlo. Then after Stanley's wife was stabbed and he was beaten they showed the guys leaving the scene but now they were in a Cadillac.
When Stan is knocked against the back of his SUV at the start of the mugging in the airport parking garage, the camera angle should show the muggers' car as seen a moment later, but it doesn't.
The amount of shave foam on Stanley's face change between shots.
During the introductory news items one of the scrolling news banners incorrectly spells 'Gangs' and 'Gnags'.
The moment when the car with the dead bodies is grabbed by the crane you can see the car is empty.
Near the end of the movie, Govener Merserve pumping the shotgun while aiming at lying down Stanley but not a single shell casing being rejected even after he fired a shot before.
When Stanley wrestle with Govener Merserve, Governor Merserve fired a few shots without pumping the shotgun to reject the spent shell casing.