User Settings/Preferences Reset?

[mad cow disease]

Running OS 10.6.2. A couple of days ago I noticed that my iCal was completely blank. Everything gone. Odd, but not a big problem - I just restored it from my iPhone. I just rebooted twenty minutes ago and my user profile has been completely reset - from the desktop settings to individual application settings. I haven't had any data loss as far as I can tell, but every single application setting has been reset - I've lost my bookmarks, startup settings, RSS subscriptions, everything that could possibly be customized within an application.

Any idea why this might have happened, and any suggestions on how to restore? I have a backup from a few days ago...I AM using filevault, I've heard there are occasional problems with corruption regarding that...

 

[JediMeister]

No insult to your intelligence intended, but you have checked that you're logged into the correct account; if you have more than one? It goes through the encryption/decryption process when logging in/out?

 

[mad cow disease]

There is only one user for this computer. I can access all of the files in my documents folder so obviously it is the correct user profile.