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 and Nadine are at the bar, Nadine starts to take money out of her purse. The shot changes and suddenly there is money on the table. Then the amount of money on the table keeps changing between shots.