Audio problem: When Ben and the rest of his friends are "out on the town", he starts his car to go home, but when he does it makes the distinct sound of an older Chrysler when he was driving a Cadillac.
Audio problem: During the dancing scene at the "hip young person dance bar," there are shots of people commenting about the old people dancing. In every shot with people commenting on the older people, none of their mouths are moving to what is being said.