Continuity: In the first movie, the wedding took place on January 6th. But in the opening sequence here the framed wedding invitation says "October 9".

Continuity: In the first film, George refers to the tree that the family carved their names in as being in the front yard. In the second film, this same tree is referred to as being in the backyard.

Other: In the scene where it's talking about the hottest summer the city's ever had (or something to that effect) some neighborhood kids are frying an egg on the sidewalk. The problem is, they're sitting and kneeling on that same sidewalk with their bare legs, and don't seem to be in any pain or discomfort.

Other: Not really a mistake, but notice that the auditioning wedding singer from the first film and the foreign man that buys the Banks' house in the second film are the same man.

Other: George and Nina are sitting in the kitchen when the ceiling leaks from the rain and George makes a comment about the roof leaking. The only problem is it is a two-story house, so the water must be coming from the floor above, not the roof.

Revealing: The monitors in the hospital attached to Mr. Banks's wife and daughter didn't move, although they should have shown something important about the patients.

Other: When George is holding his newborn baby and his grandchild, you can see that the babies are actually dolls and not actual babies. I guess it made it easier for him to hold in some shots.

Continuity: Franc gives George two Vatsnik and he takes them both at the dinner table. George asks Matty to pass the rolls. Matty passes them with his right hand. When the scene zooms out and Franc, Nina, and Annie come into the dining room, Matty's left hand is on the roll basket.

Visible crew/equipment: In the scene were George and Annie are outside discussing the sale of the house and shooting basket balls, look out for the dolly track as the camera pulls back.

Continuity: When they show the wedding invitation at the start of the film, Annie's name is shown to be "Anne Elizabeth Banks" and yet in the first film during the wedding she is presented as "Anne Catherine Banks".

Continuity: In George's montage of memories, the girl playing Annie as a little girl looks completely different from the one playing little girl Annie in the original movie.