During Frasier's first live call, he apparently falls backwards from his chair, wearing his headphones. When he gets up, he is forced to retrieve the headphones, which for some reason have been transported to the front side of his desk, several feet from where he fell.
During Roz's (Peri Gilpin) line, "And the mystery of Dave's departure deepens" she holds some papers in her left hand and some broadcast-type tape cartridges in her right. In the next the carts have disappeared and the papers are in her right hand.
In the faux flashbacks to Frasier's first show, he speaks into an EV RE20 microphone, the same model used throughout the series except for the pilot The Good Son (1993).
Martin (John Mahoney) tells Frasier that he was listening to the Mariners game, fell asleep, and when he woke up, Frasier's (Kelsey Grammer) show was on. It's unlikely that KACL would be covering Mariner's games since it's a talk station and not a sports station. Response: Game coverage and broadcasts are not exclusive to sports stations. During the 90's, it was common for non sports stations,
particularly general talk or all news stations, to broadcast games by local sports teams, which is still something of a regular occurrence today.
Flashbacks are recalled through one's own experiences. So when Frasier's flashing back 3 years ago, the events remain the same but the characters involved at that time have changed since Frasers' mind has updated the ones involved for 3 years and therefore they've aged/changed in the flashback. He has been away from Boston for 3 years and the last memory he would have of those people have not changed or aged in his mind.
Frasier says his first show in Seattle was May 21, 1993 - one day after the final episode of Cheers. In one day between his last appearance on Cheers and the beginning of his radio show, he moved across the country and landed a new job.
The flashback scenes were set three years earlier, but Frasier's (Kelsey Grammer) short haircut and Martin's (John Mahoney) completely greyed hair are unchanged from the present.
During the flashbacks to 1993, all the characters have their 1996 appearances.
Frasier misquotes Betty Davis's famous line from the film All About Eve: "Fasten your seat belts, it's going to be a bumpy night." Frasier says "bumpy ride". This however is a very common mistake, the line being more often misquoted the not.