Revealing mistake: When Frasier and his guest are standing up to leave, the girl behind the counter is watching them for her cue to come over.
Revealing mistake: Even though she has customers in front of her, the barista can be seen watching Frasier and his guest as they are talking, so she can see her cue to come over.
Factual error: When the barista hands an umbrella to Frasier's guest we can see she is wearing platform flip-flops. Health code in Seattle forbids open-toed footwear for employees in food service establishments, which would include a coffeehouse.
Deliberate mistake: The computer Felicity Huffman pushes off the desk is a dummy model and is not connected to anything. When she first pushes the computer off, the monitor only has a power cable visible. These computers were connected via VGA cable that was screwed on; it is quite difficult to disconnect it from the computer. And also when the monitor hits the ground, you hear light sounds of glass breaking and you can see as the monitor rolls that the glass is missing, yet none is to be seen - it's a hollow chassis. Obviously done as the stuff was shoved off in Kelsey's direction so as to avoid injury.
A New Position for Roz - S10-E24
Continuity mistake: When Niles and Daphne are at Cafe Nervosa, the empty coffee cup on their table changes position frequently between shots.
A New Position for Roz - S10-E24
Continuity mistake: After giving his speech at dinner, Gil gulps down his glass of wine. In the next shot the glass is suddenly half full again.
A New Position for Roz - S10-E24
Continuity mistake: When Bulldog is finishing his speech at the party, Julia looks at Roz. The angle changes and Julia has suddenly turned 180 degrees.
A New Position for Roz - S10-E24
Continuity mistake: When Niles and Daphne are babysitting Alice, a pink feather from Daphne's boa keeps vanishing and reappearing on the side of her chair.
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.