Ubuntu unveils its next-generation shell and display server

Keep in mind that KDE is not a group of a few hundred interchangeable resources that at all times work on all the projects. People work on their own area -- I never, no matter how much the temptation, have worked on kmail, for instance. The superkaramba project likely lost all activity when Plasma started supporting widgets. I don't know who the developers were, or where they went, but that superkaramba bugs don't get attention doesn't mean kwin bugs don't get attention.

The kwin team is really pretty active, and pretty responsive.