http://www.newscientist.com/news/news.jsp?id=ns99994166

Insiders blamed for most online movie piracy - Most pirate copies of popular movies circulated online are the result of leaks by industry insiders rather than home or cinema copying, according to US research. A team from AT&T Laboratories and the University of Pennsylvania created software to track movies in the US box office top 50 uploaded to file-sharing networks between January 2002 and June 2003. Seventy-seven percent of films uploaded during this period were apparently created during production or distribution. Some simply appeared online before their cinema release - meaning they must have been leaked.

well doh..... the movie industry has nobody else to blame but themselves