Comment 19 for bug 711561

 i got the cube running with wall and unity

on the compiz config settings manager (ccsm) disable auto sort plugins
add cube and so on manualy
the unity plugin has to be more at the end than the cube
the wall has to be above the cube

start the gnome-panel from a terminal, set 4 Desktops in one row to get a cube.

i uploaded my compiz config settings here :
http://ubuntuone.com/p/hSx/

and made a Video on YT to show how to set up :
http://www.youtube.com/watch?v=pjhFz-wv6Qw

hope this helps you