At the party, after Kelby proposes to Sidney, Dre and Sidney have a conversation, during which the two gold records on the wall behind them disappear and reappear between shots.
When Syd and Francine are unpacking and talking, the books that Francine are putting away appear and disappear with each shot.
When Kelby is picked up at the airport by Sydney there is a sign for the New York Knicks as he is getting off of the plane. Kelby plays for the then New Jersey Nets.
The soundtrack lists "Wedding March" by Lohengrin, but it was written by Richard Wagner for the opera "Lohengrin".
During the scene where Sidney and Dre are walking through The Mall in Central Park, you can hear someone giving set directions.