The bottom line is, you may have gone too far. If you are just testing a SEPARATE install, from your main work systems, then thank you you for contributing. That makes the "released" non-Alpha or after-Beta released systems (eventually) more stable. The maximum stability comes from a release that has been out in the wild; used my many (Just ask Microsoft. LOL. They still have MORE problems).
One can not expect every new add-on and every, everything to work in an Alpha. This is why I say there's stability and then there's stability. First, hey, it doesn't crash. Then real stability is when almost any thing you want to throw at it (real world benefits), just works.
But you know that, right? I'm sure you'll get it working anyway.
I just got Beryl working with Kubuntu Edgy and a Nvidia legacy Geforce2 with normal nvidia-legacy drivers auto installed. After Beryl install, I just had to add a few recommended changes to my "xorg.conf ". I though it was fluff. It adds extra user functionality (not just wiggley) out of the gate. Cool. looks like I'll have to turn it off to run direct 3D type games (TORCS) though.