Other mistake: The 'KISS' logo above Kiss's stage isn't actually held up by anything.
Audio problem: When the English mother at the airport says "These are all ours", she says it in a posh American accent, not an English one. (00:05:30)
Factual error: When Peter has his KISS trivia game with Dave the nudist, he asks what the ad read that brought Peter Criss to KISS, and they both answer in unison: "Drummer willing to do anything to make it". In fact, the ad read: "Drummer with 15 years' experience willing to do anything to make it". As the original ad is referenced and shown in several biographies on KISS, as well as the "KISS: eXposed" video, it's not something these two trivia experts would have missed. (00:11:00)
Continuity mistake: Stewie and Brian are having breakfast at the hotel. When they spot the hot air balloon, the plates on the table disappear between shots. (00:11:50)
Revealing mistake: When Brian and Stewie are on the tourbus, the scenery flashing past is just the same few buildings going by over and over. (00:14:25)
Continuity mistake: When Stewie is watching Jolly Farm Revue for the second time, he is sitting roughly in the centre of the mat, but in the next shot, he is sitting near the edge of it. (00:03:15)
Continuity mistake: When Brian says "You can't just ignore these years", the front cover of his magazine is different from how it was in previous shots. (00:14:55)
Continuity mistake: When we first see the English family at the airport, the girl in red is carrying a blue pack, but in the next shot, she is carrying a doll. (00:05:30)
Continuity mistake: After Peter says "Let him answer, Lois", he gets a lot closer to Dave between shots. (00:11:05)
Continuity mistake: When Gene Simmons points the microphone at Lois, she is surrounded by people with Kiss make-up on. In the next shot, when she says "Is that it?", she is surrounded by a different group of people, one of whom is not wearing make-up. (00:12:40)
Continuity mistake: In the scene just before Lois doesn't know the lyrics to the song at the KISS concert, there is a multiple flashing of members of the band. In a shot of drummer Peter Criss, he has blond hair instead of his trademark black. (00:12:20)
Continuity mistake: When Peter Criss jumps out from behind the drum-kit, the 'KISS' logo is at the top of the base drum. Then when he is singing the "Chattanooga Choo Choo" the 'KISS' logo is further down the drum. (00:13:00)
Continuity mistake: During Kiss's performance, Paul Stanley (the one with the star face paint) and Ace Frehley (the one with the grey face paint), swap places multiple times.
Continuity mistake: When Stewie puts his funky fruit hat on, his book just simply disappears from by Chris' hand. (00:20:20)
Continuity mistake: In the coffee shop Stewie puts his fork down on the table and is visible. When the camera changes to a close up, the fork has gone. (00:17:00)
Continuity mistake: During Brian and Stewie's song, Brian's cane is constantly disappearing and reappearing in consecutive shots. (00:09:00)
Continuity mistake: When Stewie and Brian are singing their duet there is one point where they are lay next to each other on the wall. But in the close up of Stewie, Brian has disappeared. (00:08:20)
Revealing mistake: When the candy tree eats the kid, the kid appears mid-screen.
Answer: Lacey Chabert was the actress who originally voiced Meg in early episodes. She left of her own accord due to being in school and other acting work; Seth MacFarlane has stated there was no tension with her leaving, but it makes for a handy joke for the show.