Look out for 'Stages.worm'

British and U.S. firms were infected with a computer virus this weekend that arrives via e-mail and convincingly masquerades as an innocent plain text file. The bug, called "Stages.worm," does not damage computer files but can shut down corporate e-mail servers. While there is some concern that employees arriving on Monday morning may be fooled into opening the e-mail that carries the bug, anti-virus companies tell MSNBC that a wide-scale outbreak is not expected. Full story to follow. -- Bob Sullivan, MSNBC