A Man, a Plan and a Gal: Julia - S11-E2
Continuity mistake: While Julia is eating dinner at Frasier's and talking - her cellphone changes position next to her plate several times - without her ever touching it.
Visible crew/equipment: When Frasier is standing through his sunroof to speak with the drivers stuck behind him in the parking garage, one shot shows Frasier's body and much of the rear window which features a very clear reflection of the boom mic.
Sleeping with the Enemy - S3-E6
Character mistake: Noel Shempsky (the supposed Star Trek Nerd) attributes the quote "The needs of the many outweigh the needs of the few or the one" to James T. Kirk, when it was Spock who said it. (00:03:50)
Morning Becomes Entertainment - S7-E19
Continuity mistake: In the initial scene where Frasier is talking to Daphne and Roz in Cafe Nervosa, Frasier can be seen wearing a wedding ring in certain shots. (00:01:10)
Other mistake: The guy who plays Clive in this episode has one of the most appalling accents I have heard. He's apparently from Manchester, but sounds like a sort of cockney South African. His accent slips around all the time; it's very poor. I wouldn't normally submit it, but his is so shockingly bad I doubt anyone would be fooled into thinking he was British.
You Can Never Go Home Again - S3-E24
Continuity mistake: The flashback is set in 1993, but all the characters look the way they did three years later. Most noticeably, Frasier's hair is short and not long and wavy like in the first season. Daphne's appearance has changed quite a bit too.
To Thine Old Self Be True - S7-E20
Revealing mistake: When Reagan drops her bag in the hallway when she is talking to Frasier, a lettuce rolls towards him. It didn't fall from her bag: if you look closely you can see it was tossed into the frame from just outside the camera view, obviously to ensure that it would land at Frasier's feet for the comic effect of him kicking it back to her.
Continuity mistake: When Frasier and Poppy are sitting on his couch having a drink, the level in the wine bottle goes down and up and down throughout the scene, with no logical reason.
The Kid (2) - S5-E4
Continuity mistake: During the scene where Frasier and Roz are talking at her apartment, the mug that had been sitting on a tray moves off the tray and is sitting right on the table.
Continuity mistake: When Frasier is talking to Claire in the store by the CD organizers you can see a wedding band on this finger. In the next shot it is not there and then it is back on again.
Space Quest - S1-E2
Audio problem: Just before Frasier opens the door to get his paper, he says "I'll get him for this and his little dog too". However, his mouth moves when he says "I'll get him for this and his...", but his mouth doesn't move when he says "...little dog too". (00:02:40)
Something About Dr. Mary - S7-E16
Continuity mistake: When we first see Daphne's wrist brace it is on her right arm. In the end credits it's now on her left arm.
Continuity mistake: Why can Lilith hear what they are saying through the door? In several other episodes, the characters have had arguments or insulted the person at the door without them being able to hear. Yet here suddenly it's possible for her to hear.
Roz, a Loan - S6-E9
Continuity mistake: Frasier and Niles are talking to Marty about the spa. As they speak, the magazines on the coffee table shift about 6 inches even though neither of them touch them.
Continuity mistake: There was an episode in which Martin attempts to end a feud between Frasier and Niles by telling a story about his detective partner. He starts with the line, "I never had a brother...", but in the episode about Frasier's cousin Nikos getting married, Martin's brother Walt was introduced.
Continuity mistake: During the opening credits, Frasier is playing the piano and Martin is going through papers on the table. When Marty says "I don't know, Eddie, must you?" there is something pink lying on the table. The shot goes back to Eddie and then back to the table, but the pink item has disappeared.
Continuity mistake: Near the start of the show, Roz is in her booth at KACL and takes out her lipstick and compact - we see her uncap the lipstick. Then Niles comes in an Frasier reintroduces them, and we see her uncap the lipstick again.
Continuity mistake: Towards the end of the show, Frasier is explaining to Niles how he was stood up that evening; at the same time he is getting himself a glass of sherry. Niles says, "there was no emergency", we see Frasier repeat the actions to get a glass of sherry all over again.
Chess Pains - S3-E18
Other mistake: When Frasier sets off the fire alarm Daphne comes running from her bedroom at the end of the hall across from Martin's room and Frasier's room. That is incorrect and impossible since Daphne's Room is on the other end of the condo and separated by the balcony. Given the condo layout, it is impossible for Daphne's bedroom to have a door across from Frasier's bedroom.
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.