Continuity mistake: When the security guard is shot at the airport, the door is shattered by the bullet leaving a visible hole. In the closing scene, when the priest is giving the last rites, the glass in the door is intact. (01:50:00)
Deliberate mistake: Vaughn is reading the Wall Street Journal folded in half as his limo leaves the airport at the end of the movie. The headline is facing the camera right side up, which means the folded part he is reading has to be upside down. No doubt WSJ paid for the spot and demanded their name be right side up.