The other issue is that I often find when putting in a new bluray, I have to re enable the HD sound options again, otherwise it reverts to Powerdvd decoded PCM.
Other then that, I have not been expereancing any other issues. Even the MC plugin has seemed stable. I do run AnyDVD HD, which means I have no HDCP issues though.
Thanks guys for making the software work, at least in my situation. HD audio is awsome, and picture quality is spectacular.