Continuity mistake: When Poppy is just about to start her show and is being emotional with everyone, Roz is standing at the door with a corded phone to her ear throughout the scene. She yells "Ten seconds." and the shot shows the phone, cord and all, has completely disappeared.
Continuity mistake: Frasier is sitting on his couch with Poppy, dropping hints about having an arts show on KACL - she has her hands folded on her knee. As Daphne says "he means your mother", the shot changes, and Poppy is suddenly holding a glass of wine, with no time for this to have happened.
Continuity mistake: Toward the end of the episode when Poppy is airing her first "arts in Seattle" show, Frasier, Kenny, and Gil convene in the hall outside Frasier's booth to talk. Right after Gil speaks during Frasier's monologue beginning with "I assure you, she is way over her depth here...", viewers can see Poppy through the window sitting at the booth with her mouth closed, looking around (and even up at the ceiling), appearing to be waiting. A split second later, the camera cuts to Poppy in mid-sentence during her live broadcast.