Continuity mistake: Mark writes Mr. Cooper on the blackboard. The shot changes, the position of the letters have changed. Later on in the scene his name is now underlined.
Continuity mistake: When Mark says "is it lunch yet?" Michelle is suddenly sitting at the table.
Factual error: When Charles Barkley says "Welcome to the NBA" after dunking on Mark, the ceiling shown above Barkley is way too low to be the ceiling for Haas Pavilion at UC Berkley where the game is being played. It only appears to be about 30 feet high.
Audio problem: There are several occasions during the two games between the Warriors and Suns where you can hear referees blowing their whistles, but play doesn't stop.
PMS: Post Moving in Syndrome - S1-E20
Continuity mistake: Vanessa tells Mark that she and Robin voted on a new rule that there is no playing basketball after 10:00 PM. Mark immediately goes upstairs to protest, and when he walks into the bathroom, Vanessa has a towel wrapped around her head and a purple masque on her face, with not nearly enough time to have put them there.
Other mistake: Throughout the episode, characters make reference to Mark's Grandma having a wooden leg, including the woman herself. However, both of her legs are visible from the knee down several times in the episode, and you can see both of them are flesh and bone.