I found that the as of Beta 2 that trick by itself doesn't work any longer. I have to rm -rf /home/<me>/.cache/compiz* and restart lightdm to get it to work. It's a reliable (for me) fix such that I created a bash script to do it and it works for me all the time.
Further to my comment #17: https:/ /bugs.launchpad .net/ubuntu/ +source/ compiz/ +bug/750386/ comments/ 17
I found that the as of Beta 2 that trick by itself doesn't work any longer. I have to rm -rf /home/< me>/.cache/ compiz* and restart lightdm to get it to work. It's a reliable (for me) fix such that I created a bash script to do it and it works for me all the time.