Something Borrowed, Someone Blue (1) - S7-E23
Continuity mistake: When Frasier is in his apartment, trying to get Daphne away from Niles, the book and decorative pieces on his coffee table change position from shot to shot.
The Dog That Rocks the Cradle - S7-E5
Continuity mistake: Bulldog is near Frasier's apartment door with baby Alice and she is facing the door. When Roz walks towards them and asks, "Bulldog do you want a job?", Alice suddenly has her back to the door, with no time for the change.
Continuity mistake: At the start of the show, Frasier is looking at a brochure and he puts a hand on his knee as he says "Gore Vidal.", the next shot shows both hands on the brochure as he says ".he hates everything."
Continuity mistake: At the end of the show Frasier, Niles and their dad are having drinks and Niles goes to top off Marty's shot glass - but just as he pours the drink, Martin pulls it away. In real life the drink would have ended up on the floor, but the scene continues as Niles keeps pouring into the glass.
Legal Tender Love and Care - S8-E6
Continuity mistake: Roz arrives at Frasier's and puts her scarf, coat, and purse behind her on the couch. In the next shot her purse and scarf are sitting on the coffee table.
Continuity mistake: At the hospital the nurse comes over to talk to Frasier about his father - her paper on her clipboard is flipped over the back of it and her hand is holding the side of it. A couple of shots later, with no opportunity to change positions, the paper is no longer flipped over and her hand is lying on top of the clipboard.
When a Man Loves Two Women - S6-E21
Continuity mistake: When Frasier and Fay are at her place talking on the couch, there is a throw that sometimes is at the end of the couch on the armrest and sometimes is on the back of the couch, behind Fay.
Continuity mistake: Towards the end of the show, Daphne, Niles, Sherry, and Martin are in Frasier's bathroom where he is trying to take a bath. He starts talking to Sherry - she is sitting on the ledge at the end of the tub. From one shot to the next she has her left leg crossed over her right, then her right over her left, and then both legs uncrossed. She did not have time to shift her position and there is no "residual movement" that would have been natural had she been fidgeting while he talked to her.
And the Whimper is... - S1-E18
Continuity mistake: At the awards ceremony Frasier is being introduced to his rival Fletcher's mother. At one point Fletcher is holding his mother's hand but in the next shot their hands are nowhere near each other.
Three Dates and a Breakup (2) - S4-E20
Continuity mistake: While Marty and Frasier are fighting Marty smashes some plates. The shot changes to the living room with Frasier apologizing and then switches back again. However, now all the smashed crockery has disappeared to be replaced by what looks to be a bowl and a tumbler.
Continuity mistake: Frasier is based on the character originally created on Cheers. In Fraiser, he lives with his father who is a retired police man. On Cheers, Frasier once mentioned his father was a scientist. It's also worth noting that in one episode of Cheers, John Mahoney, who was to later play Frasier's dad, turns up as a pianist. Frasier also said on Cheers that his father was dead. When Ted Danson made a guest appearance on Frasier, Frasier admitted that he had lied about his father since the two had been arguing so much.
The Bad Son - S8-E3
Continuity mistake: When Niles and Daphne are on the couch talking about the meteor shower, she has his hand on his left knee and he is covering it with both of his hands. After he says "two horrible wrongs", his right hand is suddenly on his right knee, with no time for natural switch.
Continuity mistake: While Niles and Frasier are discussing Marty, we can see an old shoe on the footstool, but as the shot changes the shoe is gone and there is a newspaper there instead.
Continuity mistake: Eddie has been playing on Niles' couch, and the pillows are all over the place and there are a couple of other things on there as well. After Marty's chair arrives, Niles says to Frasier, "You have to take him back now," and suddenly the couch is all tidied up, with the pillows at the ends. A couple of shots go by and suddenly the couch is a mess again.
The Kid (2) - S5-E4
Continuity mistake: Roz and Frasier are in his kitchen talking and Roz has a bottle of water. In one shot we see the bottle cap on the counter, but in the next shot it has disappeared.
Continuity mistake: When Frasier and Niles are in Cafe Nervosa, Frasier is holding section of newspaper in his lap, with an inch or two showing on the table. He and Niles suddenly grab for their cellphones and the newspaper appears fully on top of the table.
Continuity mistake: Frasier puts the tuna on the coffee table for Mr. Bottomsley and the cat jumps up and starts to eat it - he is facing the couch. In the next shot we see Eddie come into the room and suddenly the cat has moved and is facing Marty's chair - without enough time for the change.
Continuity mistake: Frederick is visiting and sitting on Frasier's couch with headphones on, playing a Gameboy. Frasier pulls off Freddy's headphones, which then lie around his neck while Frederick continues to hold the Gameboy. In the next shot, the headphones and Gameboy are on the coffee table and Freddy is sitting quite a bit to the left of them.
Roz, a Loan - S6-E9
Continuity mistake: In the scene where Niles, Frasier, and Marty are talking about the spa, the spa products on the coffee table in front of Niles and Frasier keep changing position.
Continuity mistake: Niles goes to Frasier's apartment and meets Tom, the new station manager. Niles is talking to him with his hands clasped in front of him but in the next shot his hand are clasped behind his back.
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.