I disabled Filevault today so I could switch to full disk encryption. After disabling FV and logging back into my account, some things were very messed up: -All my music was missing from iTunes. Preferences were still there. -All my Firefox settings/prefs/addons are gone. If figured that this is my problem: It looks like a new account has been created for me. I get this window if I select Go > Home. My original home folder is intact. My original "Desktop" folder seems to now be just another folder, while the Desktop folder in .de2858 is my new actual desktop folder. I have a backup, but I'd rather understand what has gone wrong so I can safely disable Filevault next time.