"This was an inside job," says Michael Moore of the pirating of his film "Sicko."

Someone with access to the master uploaded the movie to YouTube, but who? Yesterday, I speculated that Moore himself was behind the link. I'm not the only one, because Moore was asked about this and denied it. He turned the suspicion on competitors: "Who do you think benefits from that?"

The Weinstein Co. is distributing the $9 million documentary through Lionsgate but handling all marketing and other costs not related to theatrical distribution. A Weinstein Co. source said that the company has hired several firms that specialize in dealing with piracy and is taking "a very aggressive approach to protecting the film."

"Every DVD screener that comes from the Weinstein Co. is watermarked and traceable," Weinstein Co. general counsel Peter Hurwitz said. "We are actively investigating who illegally uploaded 'Sicko' to the Internet, and we will take appropriate action against that person(s)."

Good! I hope they find the culprit so I can be cured of my suspicion.