Tried to install AWN on my desktop today. After installing a custom theme, AWN told me to enable compiz first.
Each time I tried to start Compiz it would crash.
After a little search on the Internet I found the following.
Turns out I didn’t completely installed Compiz.
After running this command in a Terminal all my problems disappeared.
sudo apt-get install compiz compiz-plugins compiz-gnome compiz-core compiz-fusion-plugins-main compiz-fusion-plugins-extra compizconfig-backend-gconf