The Show Where Woody Shows Up - S6-E13
Revealing mistake: Frasier and Woody look at the Seattle tourism book, and in particular a photo of the city. However, you can see there may be some text on the page, but there certainly isn't a photo.
Revealing mistake: After Donny puts the phone onto speaker you can see him deliberately wiping the mustard from the sandwich across his left cheek to prepare for the gag at the end of the scene. (00:06:45)
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.