I cannot change the desktop wallpaper on my MBP user profile. I've got three user profiles set up, the other 2 work fine. Mine (sysadmin profile) won't save my wallpaper when I change it. - I have looked for the com.apple.desktop.plist file in my preferences folder and there isn't one in there at all. - I have reset the PRAM. - I have repaired the permissions on my HD with disk utilities. Nothing has worked. Every time I restart or change user profiles and then come back to my profile, it resets to the default Lion wallpaper. Little help...?