WORKSPACE SWITCHER FIX

After playing around with Compiz cube settings I realised that I'd completely screwed the workspace switcher. Hotkeys didn't work, clicking on the workspace icon didn't work, then it did but I had an empty desktop, no taskbar and no way to switch back! Anyway, here's the fix I found in the ubuntu forums:

Fire up gconf-editor and change the settings below
apps/compiz/general/screen0/options/hsize = 4 (or how many desktops you usually use)
apps/compiz/general/screen0/options/number_of_desktops = 1