Oscar 2009: Movie Mysteries—A Serious Man by the Coen Brothers

As the year is rapidly coming to and end, several movie mysteries need to be addressed? Could anyone please explain why Joel and Ethan Coen's latest feature, "A Serious Man," considered to be one of their most daring and most personal films, has performed so poorly at the box-office.
 
As of today, "A Serious Man," which is darkly humorous in tone, like most of the brothers' previous work, has grossed only $9 million. The film has been most favorably reviewed by most critics. According to Rotten Tomatoes, its grade is 87 percent, which means that the film has received mostly positive notices; only 13 percent of the reviews were negative.
 
The last two Coens' movies, the 2007 Oscar-winner, "No Country for Old Men," and the broader, star-driven comedy, "Burn After Reading," were box-office hits.
 
Was it the marketing strategy? The theatrical release pattern by Focus Features, a wonderful company that had scored with other Coens pictures.
 
Admittedly, "Serious Man" boasts no stars or name cast, but please but don't say that the movie is "too Jewish" or "too subtle" for Middle America?