https://bugs.launchpad.net/bugs/663659
I reported this bug: Essentially, trying to enable RGBA in the Ambiance theme will cause Nautilus to crash on startup (and the desktop wallpaper to be blank) unless you disable it for Nautilus or use Nautilus Elementary like I'm doing. Please, do *NOT* enable RGBA in the Maverick Meerkat (unless you have Nautilus Elementary) until this bug gets fixed. Thank you.