Continuity mistake: Niles runs to Daphne's Room with a full glass of sherry. He jumps into and out of the room and suddenly the glass is empty, even though he never drank from it, and it wasn't spilled. (00:20:40)
Continuity mistake: Roz, Niles and Frazier are in Cafe Nervosa having coffee. Niles has his hand open against his cup while Roz is making a suggestive remark but in the next shot his hands are laced together on the table.
Continuity mistake: Frasier gets caught in Daphne's Room for the second time and crouches down beside her bed with the quilt over his head. He then sneaks into the bathroom - the quilt is left hanging over the edge of the bed. Shortly afterwards he runs out of the bathroom and the quilt is now folded over, completely on top of the bed, even though no one went near it. (00:13:30)
Answer: In the last episode, they explained that Tossed Salad and Scrambled Eggs is a metaphor for the mixed-up people to whom Frasier dispenses his radio psychiatric advice.