Could your "Odd..." have something to do with my submitting
the message through
the fedora HYPERKITTY web site rather than e-mailing it through Thunderbird?
Possibly. I'm replying in Hyperkitty to check this.
FWIW, I agree with Samuel that you've probably not waited long enough for the nVidia
drivers to be rebuilt. This takes a bit longer than usual at the end of an upgrade. You
should also check /var/cache to see if you have an akmods directory. If you do, look in
that directory and there should be a log file telling you what was going on around the
times you were booting.