i have no idea what i've done. My roommate was on my computer but i needed the computer to dl something real quick. I stayed on as her, but was just making sure the firewall and all that stuff was running on her username. to make changes i had to put in my password and all that stuff....so thats cool. Then I log back on to my username later that night, and everything on my desktop is gone. I go back to my roommates user name and all my desktop stuff is there as a mounted drive on her desktop. What in the world happened? and how do i change it back.
edit: the mounted drive is named after my username, and it contains everything that is normally under my macintosh hd/users/"myusername" . I also remember being asked something about a sparseimage