Visible crew/equipment: When Frasier is standing through his sunroof to speak with the drivers stuck behind him in the parking garage, one shot shows Frasier's body and much of the rear window which features a very clear reflection of the boom mic.
Continuity mistake: When Grace gives Nadine a drink she takes the cover off and puts in on the table right in front of her. At one point during the scene it moves to the middle of the table.