The marquee advertises The Jazz Singer (1927) as being "all taking," which it was not, nor was it ever advertised as such.
Kurt Bergner said that John Gilbert's contract was ended after the sound film era began. In reality, the transition to talkies went smoothly for Gilbert and he made various sound movies for MGM.
Buster Keaton started acting in the movies in "The Butcher Boy" in 1917, not in 1920 as shown in the film.
Keaton's wife, a stylish studio employee, continues to wear WWI-era fashions well into the late twenties and early thirties.