I had the same problem. I tried the above suggestions without success. I also tried gconf-cleaner with no luck. I was finally able to fix this by doing an rm -rf .compiz* from my home directory and restarting lightdm.
I had the same problem. I tried the above suggestions without success. I also tried gconf-cleaner with no luck. I was finally able to fix this by doing an rm -rf .compiz* from my home directory and restarting lightdm.