Continuity mistake: When Marty, Niles, and Frazier return from the taping of the Antiques Road Show, Marty hangs up his blue windbreaker and then Frazier hangs up his gray raincoat, obscuring Marty's coat. But throughout the scene, all we see is Marty's blue jacket - where did the raincoat go?
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).
Continuity mistake: Early in the show Niles and Daphne are in the kitchen talking while Daphne makes tea. She puts the lid on the teapot and in the next shot the lid is on the counter again.
Continuity mistake: During the opening scene, Niles is on the phone to his chef, and behind him, on a table, are two champagne glasses (beside the phone base)and 3 candles. He hangs up the phone, moves away and 2 of the candles and the glasses have disappeared, and the phone has been pushed further over. He sits on the couch, then goes to get the ironing board - when he sets it up we see the glasses and candles are back.
Continuity mistake: In the opening scene, Niles goes to pour sugar on his spoon and the top of the sugar dispenser comes off and disappears - it looks like it goes into his lap. We don't see the top again until after the teenager says, "Aren't you going to yell at them?" and suddenly it is in plain view, on the right of the table.
Continuity mistake: When Roz opens her gift of a bracelet from Frasier, he puts it on her and she feels guilty, so she goes to call Luke - but as she leaves the table, there is suddenly no sign of the box the bracelet came in.
Continuity mistake: Marty gives Niles a mug which says "World's Greatest Psychiatrist." He puts it down on the coffee table with the lettering facing the camera. He then leaves with Daphne and a few shots later, we can see the mug again, but it is turned around and we see the blank side. When Frasier leaves the apartment, it's back in its original position. Nobody ever touched it.
Something Borrowed, Someone Blue (1) - S7-E23
Continuity mistake: Just before Simon returns from California, Roz's purse is lying flat on Frasier's coffee table. As she goes to pick it up, the purse straps are sticking up, even though no one went near it between shots.
Continuity mistake: As Frasier tells Bulldog that he shouldn't feel threatened by Clint, we can see the edge of a clipboard moving on the bottom right screen, where Roz would be. However, in the shot before that, Roz had pretended to punch Bulldog - she had nothing in her hand and wouldn't have had time to pick anything up.
Three Dates and a Breakup (2) - S4-E20
Continuity mistake: When Marty is explaining why he broke up with Sherry, we can see his blue jacket hanging up on the book by the fireplace - as he says "I said it back", the coat is no longer there. It does reappear in later shots.
Plot hole: During the scene when Frasier is in Cassandra's hotel room, he phones Roz and puts his phone back in his jacket pocket. He hangs his jacket on the back of the chair and eventually gets into bed with Cassandra, who soon falls asleep. He talks to her but she doesn't answer. We then hear him phoning Roz - but there was no time for him to get out of bed and get the phone - and no sounds of him doing this.
Continuity mistake: Donny is preparing Frasier for court and has a pencil in his hand which goes from eraser side up to lead side up and back again, from shot to shot, without him changing it. (00:08:30)
Continuity mistake: While Frasier is singing on-stage to Monica, a shot shows Roz from the back, and her left hand is on the table - but in the next shot her hand is stretched out holding her date's hand.
Continuity mistake: When Niles is in his office telling Frasier about Shenkman and Maris, a crumpled tissue moves around to different spots on the desk from shot to shot, although no one touches it.
Continuity mistake: When Cassandra and Frazier enter the hotel room, she removes Frasier's coat, and then throws her purse onto her chair and her coat to her right. The next shot shows her heading towards the bathroom carrying her coat.
Continuity mistake: When Niles, Frasier, and Roz are in Cafe Nervosa arguing about getting a table, Roz's purse switches from her right shoulder to her left shoulder, even though she did not move it.
Continuity mistake: At the play run-through in the apartment, Gil is holding his script with a couple of pages folded back. The shot changes and as he says "romping with my school chums", the script is closed with no pages folded back, even though he had no time to change them.
Continuity mistake: Just before Frasier says "What I want is to be left alone", Roz, Niles, Marty, and Daphne are standing at the door. The shot goes to Frasier, and then back to them, and they have all changed positions, with no time to have done this naturally. (00:21:25)
The Show Where Sam Shows Up - S2-E16
Continuity mistake: Near the end of the show, at the end of the scene in Sam's hotel room, Frasier sits down on the couch; his raincoat is over his hands and wrists. The next shot shows his left hand and arm lying on top of his coat.
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.