A press release by Unix publisher SCO Group claims that “Linux is an unauthorized derivative of UNIX and that legal liability for the use of Linux may extend to commercial users. SCO issued this alert based on its findings of illegal inclusions of SCO UNIX intellectual property in Linux.”

Apparently, SCO hasn’t initiated legal proceedings against anyone, but it has suspended distribution of its own version, SCO Linux. The company is also magnanimously saying it won’t prosecute its own customers for copyright infringement (no word on whether it will be hauling its own engineers into court, though).