OS X wont show desktop
I deleted ~/Library/Preferences/com.apple.desktop.plist which seemed to help momentarily, but the the problem began again. in that time, I noticed an app called "DeskShade" that was running, and said wtf is that? So I did sudo rm -rf DeskShade.app/  I rebooted, and my desktop is back. It's been good for about 30 minutes, hopefully removing this app is the solution.