Source is CrunchGear and it is reporting that a new trojan horse has shown up that has the ability to remotely access your system and take your system and user passwords.
Link is here: http://www.crunchgear.com/2008/06/20/trojan-horse-affects-mac-os-x-104-and-105/
Link is here: http://www.crunchgear.com/2008/06/20/trojan-horse-affects-mac-os-x-104-and-105/