When Frasier and Portia are talking at KACL, after Frasier's show, an extra dressed in a Cafe Nervosa apron walks past in the background. It is established that Cafe Nervosa is across the street from KACL and it is not mentioned if Nervosa delivers or not. This is unlikely a goof, since there are no scenes in this episode set in Cafe Nervosa.
When Martin asks Niles to fill a prescription for him, Niles refuses, stating that he would have to examine Martin. In a previous episode (season 4, #20), when Daphne had fled to Niles's home after a squabble with Sherry, they had returned to Frasier's for Daphne's forgotten medication. While commiserating with Niles over the lost opportunity to have Daphne overnight at his place, Frasier says that he "has a prescription pad and there is a pharmacy" nearby. If he couldn't write a prescription for Martin without an exam, why would he be able to do so for Daphne?