Continuity mistake: At the end of the movie in the scene where they are moving into the new office, Peter is talking to Charlene at his desk. Behind her there are three books stacked in a certain order. Later in the scene when he is talking to his wife the books are stacked differently. (01:37:40 - 01:38:45)
Continuity mistake: When Peter catches Georgey reading the adult magazine, Peter says to Charlene, "I'm turning you in." At this point in the movie Peter doesn't know she escaped, so there would be no reason to turn her in.
Continuity mistake: When Peter goes to his ex-wife's house to pick up the kids, Georgey is seen playing a GameBoy Advance. In one shot you can see the screen of it and it is blank, which means it is turned off. Why would Georgey be playing with a GameBoy when it's turned off?
Continuity mistake: When Mrs. Arness is playing golf the sun is casting a shadow behind her. After she hits the ball she turns 90 degrees and the shadow is still behind her when it should be beside her.