Great sites
Mistakes
The second cat that Deeds rescues is a gray and black tabby with white paws, but when it is about to hit the catcher, it's turned into a ginger cat. When a man comes out of the manhole with the cat in his arms, it's a gray and white tabby with dark paws. See more...
Trivia
Sticking with the To Kill A Mockingbird references, in the scene where Deeds and Pam are outside of Pam's "apartment" and the old lady and dog walk out. She calls the lady "Mrs. Finch" and the dog "Atticus". Atticus Finch was the main characters name in To Kill A Mockingbird. See more...
Mr. Deeds (2002) - 1 easter egg
Directed by Steven Brill, starring Adam Sandler, John Turturro, Peter Gallagher, Steve Buscemi, Winona Ryder (add more)
Easter eggs are hidden bits on DVDs which if you know where to look can provide all sorts of fun extras.