The Mexican

Corrected entry: When the guy gets shot while relieving himself, if people a bit more than 10 metres away were shooting (and they were drunk) with the speed of a bullet, wouldn't it go a bit further than that?

Correction: The wound is clearly shown to be on the top of the head and there are several scenes showing drunken people firing pistols into the air and there's a scene of Jerry dodging bullets that are falling from the sky. Jerry even mentions this to Ted as he's explaining what happened. A bullet fired straight up would be expected to fall within a certain radius of the shooter.

Tax Dude

Corrected entry: After Julia Roberts shoots Jerry's boss in the neck, it shows him pulling the neck down on his shirt. Before he pulls it down you see that there is no hole in the shirt where he was shot.

Correction: There is actually a hole in the rollneck of his shirt shown as a dark spot. It is easier to see it on the DVD using the zoom function.

Corrected entry: About 60 minutes into the movie, Jerry (Brad Pitt) has finished the task that has caused him to travel to Mexico and is able to return to the U.S. He gets to the airport and the airline attendant asks for his passport, he shows it to her but he realises that it's not his, someone had switched passports with him. He had to stay in Mexico, and thus the wackiness and mishaps continued. You do not need a passport to enter or leave Mexico, just a birth certificate.

Correction: This may be true for border towns or resorts, but for auto travel in central Mexico, you certainly do need a passport.