The Friend - S3-E11
Continuity mistake: Roz is showing Frasier some faxes in his booth at KACL - as she holds them they are folded over. As she says "are you nuts?", the papers are flat in her hand, no longer folded over, with no time for her to have changed them.
A Word to the Wiseguy - S3-E15
Continuity mistake: Frasier is on the phone at KACL with Jerome's girlfriend and the reflection in the glass shows him raising his hand to his face, but the next shot returns to him - his hand is on the console. There was no time for him to have shifted positions normally.
Continuity mistake: Fairly early in the show Frasier has his dad call the police station to ask about a female officer Frasier is interested in. Marty asks for her name, hangs up, and gives Frasier a lot of information about Maureen that he couldn't have possibly learned in that short a time.
Kisses Sweeter Than Wine - S3-E5
Continuity mistake: Frasier comes home from work and Joe is explaining what work needs to be done. The shot changes as the phone rings and suddenly Frasier's coat, which had been over his left arm, is over his right arm.
You Can Never Go Home Again - S3-E24
Continuity mistake: Daphne is on the phone with her mother and has a dust rag in her hand. She holds out the phone towards Frasier and when the shot goes back to her, the rag is all bunched up in her hand - it has been loose before. There was no time for her to change it.
Continuity mistake: At the beginning of the show, Frasier and Niles are in Cafe Nervosa and Roz comes in, with lots of Christmas gifts. She manages to unload them, take off her coat and get into a chair between the guys - all in a couple of seconds. It all happens too quickly for "real time".
Continuity mistake: Frasier's in the toy store and another customer comes in with a carrier bag of educational toys he bought elsewhere. As Frasier tries to talk him into selling him the toys, some shots show just the bag with the toys in it and other shots show a roll of green wrapping paper visible about 6 inches above the bag.
Continuity mistake: As Frasier is saying "too often we shrink from doing things we really want to do", the shot goes to Roz, and we can see the reflection in the glass shows that Frasier's mouth and hand movements do not match what he is saying.
The Show Where Diane Comes Back - S3-E14
Continuity mistake: Frasier is in the kitchen and gets the sugar out to sprinkle over the profiteroles. As he starts shaking we get a wider shot and we see there is sugar all over the stove top, pastries, plate, and counter - way more than there should be for the amount of shaking going on.
It's Hard to Say Goodbye If You Won't Leave - S3-E10
Continuity mistake: When Frasier and Kate are in the airport, sitting down and talking, her arms switch back and forth from being folded to unfolded (holding her boarding pass). This happens a couple of times, without time for her to change position.
You Can Never Go Home Again - S3-E24
Continuity mistake: Niles and Frasier are at Marty's old apartment and Niles sits down on the couch. Eddie is sitting next to him, staring. During this scene, the shots of Eddie show him moving from fairly close to Niles, to about 10 inches away, and then back again. He has no time to change position naturally.
The Show Where Diane Comes Back - S3-E14
Continuity mistake: Frasier, Martin, Niles, Daphne, and Diane are having dinner at Frasier's and he gets up to get dessert. Niles offers to help him and puts his table napkin in his chair. As he walks towards the kitchen, though, the napkin is lying next to his plate.
The Friend - S3-E11
Continuity mistake: In the last scene, at the Cafe, Bob puts a dollar on the table in front of him. A waitress brings a cup and puts it down - the dollar has disappeared. In subsequent shots it reappears.
The Friend - S3-E11
Continuity mistake: Frasier and Bob are in Cafe Nervosa talking. Bob has a book in his hand. In another shot he is moving his hands around, even though there was no time for him to have put the book down.
The Show Where Diane Comes Back - S3-E14
Continuity mistake: Diane is sitting in Frasier's apartment, at the dining room table, talking with him. Her hands are in her lap in one shot and then up in front of her in the next - in mid-sentence.
Revealing mistake: Near the end, in Cafe Nervosa, the guy that wants to sue Frasier gives Niles a push. Niles stumbles backwards, knocking over some chairs and the coat rack before falling down, taking the table by the window with him. If you look closely just before he hits the table, the woman sitting there (rather than moving out of the way), very subtly pulls on the table, so as to upend it so Niles can go down with it.
A Word to the Wiseguy - S3-E15
Continuity mistake: At the end of their meeting outside Cafe Nervosa, Jerome throws his red paper napkin on the table and they say their goodbyes. In the shot after he walks away there is no sign of the red napkin.
Martin Does It His Way - S3-E3
Continuity mistake: When Niles dumps Aunt Louise's ashes out of his shoe and onto the floor, there is carpeting under the pew. In the closing credits when the janitor is sweeping up the ashes, the carpeting is in a different place.
Visible crew/equipment: Halfway through the episode, the new station manager says she has to fire someone. If you look at the top of the screen by the white box on the wall, you can see the boom mike.
Continuity mistake: While Daphne and Roz are talking in the kitchen, Daphne takes a carton of milk out of the fridge - and puts it down on her left - in the next shot it is on her right (with no change of camera angle).
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.