Hello, I'm using a 2.33 GHz MacBook Pro running the latest version of SL. I periodically like to step away from my desk, so I'll click on my name in my Mac's menu bar to initialize 'fast user-switching', so that no one could use my computer without entering a password (similar to "lock" in Windows XP+). When I log back in however, I find that the desktop background that I had set was automatically changed to the default SL background. Could any of ya'll provide an explanation as to why this happens? Maybe a fix? Thanks. PS: I'm running the MBP in desktop mode on an external monitor (although the problem still exists when I'm only using the MBP+no screen), and as soon as I set an image as a desktop picture, I throw it in the trash.. maybe that is helpful info. regarding diagnosing my problem.