Other mistake: When Barton returns to his room to find one of the detectives reading out his film script, it ends with "We'll be hearing from that crazy wrestler, and I don't mean a postcard. Fade out. The end." When we earlier saw Barton typing the end of this script, enough was visible to show that the last line of dialogue was "We'll hear from that kid, and I don't mean a postcard", and there was no "Fade out".
Barton Fink (1991)
1 other mistake - chronological order
Directed by: Joel Coen, Ethan Coen
Starring: John Goodman, John Turturro, Judy Davis, Michael Lerner
Revealing mistake: In the scene where John Goodman is facing off with the cops, the walls of the hotel catch fire as Goodman runs down the hallway towards the cops. You can easily see the pyrotechnic cord strung along the wall.
Ben Geisler: What Ted Oakam doesn't know you could almost squeeze into the Hollywood Bowl.