Comment 5 for bug 218180

Compiz is still pre-alpha software, unstable and simply not integrated into any desktop environment but distros keep pushing it to pretend being cooler. I really dislike Ubuntu's default behavior on enabling Compiz after install.

But there's light at the end of the tunnel, at least with KDE4 no compiz is necessary anymore, they have perfect composition+effects integration into KWin toghether with a nice configuration interface (+ it works with OpenGL or software XRender). Don't know when Metacity will have it.