Comment 3 for bug 213025

I am having this same problem. I installed via Ubuntu Hardy Beta CD. I enabled the restricted ATI driver through "Hardware Drivers" (jockey). Update Manager updated compiz and replaced some packages. The reason this is broken is that I do not have /usr/bin/gtk-window-decorator. I believe this file is part of compiz-gnome. The only packages I've installed manually are postgresql-8.2 and powertop. I think there is something missing in the Ubuntu UI to include compiz-gnome.