Seems like the installation files I had was messed up or something. I uninstalled the test site I had, downloaded a new msi package from the Community Server site and installed it. And voilá! It works. It looks good! I like it! The control panel isn't available for users without some admin intervention, but at least it works.
I will test it some more, and try to figure out how to migrate the existing blogs at blogs.spipp.net to the new version.