On 12-07-2008 My Ubuntu PC Mysteriously opened the text writer known as Gedit, And there in front of me it spelled out the hacker wrote "I am the devil" I asked the hacker who he was and he just kept saying Satan ad stuff like that, He then deleted all the text we had written, and took control of my mouse, and computer for a minute or two, so I would consider this a serious issue for Ubuntu, How do I fix this, I installed Guarddog, But it says im not a super privileged user and im an administrator to the system. So yeah there is a huge security breach.