I bought The Big Sleep used at a local GameStop for 5 bucks. We weren't far into the side of the DVD containing the theatrical release when it became clear there was a serious problem with the disc. We couldn't fix it, so we watched the pre-release version. It had some minor glitches but not too many. The film is based on a book by the same name by Raymond Chandler. It is directed by Howard Hawks and stars Humphrey Bogart and Lauren Bacall. Also in this movie are Dorothy Malone, Elisha Cook, Jr. and Ben Weldon. The Husband picked this film, and we all enjoyed it. After the movie was over we watched the "special feature" documentary on the differences between this version and the theatrical release. That was interesting.
Images Journal has a review, as do Reel Classics, Senses of Cinema, the New York Times and Salon.com. Roger Ebert considers it a "Great Movie".