During the circus interview (1:05:14), a reporter asks "Is it your belief that all dandies are homosexual?" to which Brian Slade replies, "Nothing makes one so vain as being told one is a sinner." When the next day's newspaper is shown (1:07:42), Slade is quoted as saying "Nothing makes one so bold as being told one is a sinner."
When Brian Slade is being introduced to Curt Wild by "Rodney from Elektra", his cigarette is hanging out of the side of his mouth. After a quick shot on Brian, Curt is shown with the cigarette hanging out of the center of his mouth.
There are ads for "Miss Saigon" and "Les Miserables" on the side of the London double-decker bus in 1974 London.
When Maxwell Demon gets shot in 1974, the bass player is holding a Gibson Thunderbird centennial reissue, a bass that didn't come out until 1976.
A closed-circuit TV camera housing appears outside the theater for Brian Slade's concert as the shot pans across a queue of fans early in the film. Such outdoor CCTV security and surveillance only became widespread in the mid-1980s, while that particular style of camera housing did not appear for some time after that.
During the "Death of Glitter" concert, an acoustic rhythm guitar can be heard playing throughout the song. There is, however, no one on stage playing an acoustic guitar.
During the "Death of Glitter" concert, the bassist of The Flaming Creatures takes his hands off the bass for several seconds to reattach the shoulder strap during the song "20th Century Boy", but the bassline of the song continues uninterrupted.
The clear acoustic guitar heard during the "Death of Glitter" was played by Ralph Morse, but is unseen on stage.
When Brian is onstage at the Sombrero Club and the members of the audience are clapping along with him to the music, the motions of their hands do not match the rhythm in the music.
During the press conference with Tommy Stone post concert, Alastair G. Cumming's mark is clearly visible on the floor.
In "New York City 1984" the cars are driving on the left-hand side of the road and there are British traffic signs.
The light switches in the New York newspaper office are British.
Arthur figures out the mystery of what happened to Brian Slade by seeing Shannon on TV. He however had no idea what she looked like so seeing her on TV a decade after the events that led to Brian's "death" could not have happened.
(at around 1h 26 mins) In the scene "The Break-up" as Toni Colette's character walks away from Jonathon Rhys Meyers a boom microphone shadow comes into view.