entire movie was inspired by a piece of art the Coen brothers
saw while shooting The Hudsucker Proxy. It was basically an
old 40's style poster with pictures of different haircuts. From
that they decided they wanted to make this movie.
Cannes Film Festival first for the Coen brothers- The Man Who
Wasn't There won the Best Director gong but shared it with David
Lynch's Mulholland Drive.
The movie was shot in colour and then transfered to black and white film (read this interview with Roger Deakins the cinematographer for confirmation). USA Films wanted to be able to issue the movie in colour in some European countries. So it is true, after all, that a colour version exists. Indeed it is available in a fine 3 disc DVD edition in France. You can check out some comparison screen grabs between the original version and the colour version here and order the DVD for yourself from amazon.fr.
Bob Thornton agreed to star in the movie without even reading
Polito's character, Cregiton Tolliver, the pansy, has an unusual
forename, yet it is one shared by the friend with the two broken
hands in the tale recounted by private detective, Loren Visser
during his meeting with Marty to discuss the murder of Abby
and Ray on the overlook in the Coen's debut movie, Blood Simple.
an interview on the Observer's movie podcast in March 2008 with
Roger Deakins discussing No
Country For Old Men, he was asked which of the Coen brothers
movies was his favourite. He said, without delay, The Man Who