Since I upgraded my work PC to Karmic yesterday, Nautilus is no longer showing the desktop background and icons. Nautilus is running and, for example, the desktop contextual menu is showing when I right-click the desktop, but the desktop itself is solid black and no icons are showing (there are some files on the desktop).
I looked in gconf, and apps/nautilus/preferences/show_desktop is set to true.
I've tested Karmic on my personal desktop since alpha1, and on my laptop since about alpha3, and I didn't have anything like that.
Any suggestion on what to look for to fix this?