Phil corrected Claire that their song was "If You Leave" and that he sang it at their wedding. However, later during their trip in Hawaii, Phil reveals that Claire and he never had a proper wedding.
Sal removes the paper umbrella from a drink and in the next shot the umbrella is back.
In the bar, Mitchell is sitting next to Cameron. In the next shot, he is at the opposite end of the table.
When Hayley tries to sneak out the back door only to be caught by Jay, she places her hand on the window of the door as she opens it. The window appears to waver as she touches it. The window appears to not be glass.