If you use Beryl from this repo and have it installed:
deb http://ubuntu.beryl-project.org edgy main
deb-src http://ubuntu.beryl-project.org edgy main
or
deb http://ubuntu.beryl-project.org feisty main
deb-src http://ubuntu.beryl-project.org feisty main
Make sure to remove beryl-plugins-extra first; the new version conficts with beryl-plugins.
Read the rest here
