At the very end Val comes out of the building wearing white sneakers, but in the next fragment he walks away wearing black boots.
At approximately 1:15:30, while the four of them are gearing up to storm the FEMA trailers, Andy is leaning up against the trunk of one car. In the next shot, his back is to the Cadillac. In the next shot he is seen leaning up against the other car again.
When Pepe and Barney are following the Chevy with all the lights right after it is first shown to us the car is on the left side of the yellow line in the road. In the next shot we see the car right of center on the correct side of the road. Then the next shot shows the car back left of center and when the next shot appears showing the car coming towards us it is back on the correct side of the road.
It's mentioned that someone gets home before the eleven o'clock news. There is no eleven o'clock news in New Orleans which is on CST, so the news is at ten o'clock.
In the scene where Jambalaya Jake dies, you can see spend ammunition (empty casings) at the top left of the screen. These are blanks casings. That is, this is what's left after you've shot off blank rounds instead of real ammunition.