Other mistake: When the second group of people brought before the judge are sentenced, they are put to death in Mr. Bone Stripper. Curious note: though it kills the people, and chucks their remains out the end, there is absolutely no evidence of the clothing that was on their bodies. There is no pile of shredded cloth anywhere to be seen in the salvage yard.
Other mistake: When Moss confronts the party crasher who has a gun to the arms dealer's head. The party crasher then pours gasoline all over the pumps and Moss shouts "Don't shoot, you'll blow this place up, I'm standing in the shit". As the scene eventually cuts back to Moss on a long shot, you can see that the floor is dry and he's not actually stood in the gasoline. (01:20:00 - 01:21:00)
Other mistake: When Leonardo lifts up the bar he has just fashioned, you can hear a couple of people in the background say "Gold" where the others are and correctly saying "Oro" (Since the Italian word for gold is Oro).