I don't know why this is, but for some reason some of my gnome RPM's have installed into /opt/gnome, and other into lib. The file /usr/bin/gnome-config lists /usr as the prefix, so that the gnome libs in /opt/gnome/lib are not visible. If I change the prefix to /opt/gnome then those libraries are visible, but the ones in /usr are not! How do I fix this?