Hey All,
Heads up!
For some reason the Software Updater thought it would be interesting for me if it upgraded my nvidia 304 driver with the nvidia 310.32-1 driver. That would be nice if the 310 driver supported my crusty old GS 7600 but it doesn't. I had to run two yum downgrade sessions to get it back to working again. First downgrade brought me 310.19-2, which doesn't support my video card, in place of 310.32. The second downgrade restored the 304 driver.
I'm not sure about this but that seems like a bug when it thinks that the 310 driver package is an upgrade for the 304 driver package.
Jan 23 21:43:39 Updated: kmod-nvidia-310.32-1.el6.elrepo.i686 Jan 23 21:43:49 Updated: nvidia-x11-drv-310.32-1.el6.elrepo.i686 Jan 24 00:43:58 Installed: kmod-nvidia-310.19-2.el6.elrepo.i686 Jan 24 00:44:10 Installed: nvidia-x11-drv-310.19-2.el6.elrepo.i686 Jan 24 00:59:38 Installed: kmod-nvidia-304.64-1.el6.elrepo.i686 Jan 24 00:59:49 Installed: nvidia-x11-drv-304.64-1.el6.elrepo.i686