A new Internet virus was spreading fast throughout Asia, Australia and Europe but computer security experts were divided on the seriousness of the threat from the "Bagle" worm, and reckoned home users were most at risk. Experts expected some impact in the United States when people returned to work Tuesday after a holiday weekend. The "Bagle" or "Beagle" worm arrives in an e-mail with the subject "hi" and the word "test" in the message body. If the accompanying attachment is executed, the worm is unleashed and tries to send itself to all e-mails listed in the user's address book. Sometimes...