thank you so much! have been tearing my hair out!!
my problems started when I installed tint2 and it stole the icons from the top bar (including the startup programs!), then unitiy vanished leaving me with a useless desktop.
using ccsm via the terminal worked a treat!
I though from what I have read that compiz had been replaced with mutter, but this would not seem to be the case as I don’t even have mutter installed!