Continuity mistake: When Roz and Frasier are in Bebe's office, and Frasier is exclaiming about her taking digitalis, the water glass in front of her is empty. The rest of the shots show it being about half full, even though she never refilled it, and there was no water source to be seen.
Continuity mistake: When Roz begins her mock interview with Frasier, Niles is holding the microphone in her direction. After she says "from Bellingham", he moves it to the left for Frasier's answer. But the next shot shows that the mike is still pointed at Roz, and then we see Niles move it to the left again.
Continuity mistake: When Frasier and Roz are in his kitchen talking about audition tapes, sometimes he is holding a glass of sherry and sometimes he is not; it is not a case of him putting it down, as the scene goes to quickly for that. During the same scene, Roz's beer switches hands, and there was no time for that either.
Continuity mistake: In the same scene where Bebe's hands change position from shot to shot, and Frasier is warning Roz about Bebe having no reflection, Frasier's hands on Roz's arms change as well. In some shots his hands are on her upper arms, in others they are on her lower arms.
Revealing mistake: Bebe is in the booth telling Frasier how she misunderstood him about Roz. As she says "wink", we can see Frasier's reflection in the booth's glass - his head bobs up. The next shot we see, though, is of Frasier's head bobbing up - shot at the same time, we just see it a split second later.