compiz-0.3.6-2.fc7 1. Install FC6 (or at least the FC6 metacity) 2. Do a "yum -y update --enablerepo=development compiz" 3. The new compiz is installed 4. Try to switch to using compiz: gtk-window-decorator will crash The problem is that compiz uses a library private to metacity, and its interface must have changed between FC6 and F7, thus making gtk-window-decorator crash in metacity code. compiz should hard-code its dependency on metacity (and its private library) to avoid such problems. Installing metacity from F7 as well makes it work fine.
Ah, ok, I added Requires: metacity >= 2.18 to the spec file.