New this month Factual error: When they get on the flight to Chicago, it's an American Airlines 747. No airline in America would fly a 747 from Ohio to Chicago, a 1 hour or so flight. No one would waste the amount of fuel and costs to fly a plane that big full of passengers for such a short flight.
Continuity mistake: During the sales trip the two main characters stop at a gas station to get gas. during this stop Tommy bends the door back and after some struggle gets it to the normal door position. Before Richard gets back to the car however there is a shot of the door all dented up but in place. When Richard pulls the door off it falls to the ground and there isn't a single dent on it. (Also, is it me or does it seem a little ridiculous that someone that loves his car so much didn't notice the large dent down the edge of the door as he faced it while walking from the station to the car?)
Continuity mistake: In the scene where Tommy and his 'girlfriend' are sitting in the boat and about to get picked on by the kids on the shore, Tommy's Life jacket changes. One shot it's got a white line and a button on it and in the next shot, they're not there. Then the line and button show up again.
Continuity mistake: Tommy is celebrating with his father the recent engagement. First you see them pouring the champagne, then second you hear the champagne bottle being opened. (There is only one bottle of champagne.)