Visible crew/equipment: Sarah Jessica Parker is supposedly alone in the bathroom having a soak. Someone shouts that there's a phone call for her, and you can clearly see one of the film crew's head in the shot.
Continuity mistake: When Jeff and his father are talking at the dinner table and his father is convincing him to be in the contest, each time the camera cuts to either one of them the sugar bowl on the table either has the lid off, or on. It changes every cut. Same thing with their mugs.
Lynne: Velcro. Next to the Walkman and Tab it is the coolest invention of the 20th century.