I have a problem with Karmic Koala. I installed awn, but when I activate it, it does not work!
It was asking that a windows compositing manager be installed and suggested typing
compiz on the command line. When I typed that, compiz reported that no suitable xorg file was found, no Xgl support and that it is defaulting to the metacity window manager.
It turns out that for my ACER 4520 laptop with Nvidia 7000 card, I have to install hardware acceleration drivers for an Nvidia 7000 card, so that there will be support for Xgl. After installing it, do not fail to activate it. I also installed compiz modules via the graphical synaptic installer.
After this install, requiring a reboot, the awn dock now displays as it should.