I am starting the upgrade from fedora core 5, to fedora core 6 tonight. We’ll see how this goes. Basically I ran…
1. yum clean all
2. rpm -Uvh
http://download.fedora.redhat.com/pub/fedora/linux/core/6/i386/os/Fedora/RPMS/fedora-release-6-4.noarch.rpm http://download.fedora.redhat.com/pub/fedora/linux/core/6/i386/os/Fedora/RPMS/fedora-release-notes-6-3.noarch.rpm
3. yum -y update
4. updated nvidia driver via yum, and all was well.