Re: X crashing at startup after update
Lonni, you're the best!
I did as much from that page as made sense for me on Ubuntu (basically all the installs/uninstalls in the last section), stopped X, and ran the 1.0-9626 package again from the shell, and this time it compiled and installed properly. I restarted for a full test of the computer being fixed, and it worked as before - with X starting up normally (new, slightly changed Nvidia splash screen), and my dual screens coming to life. I feel whole once more.
Thanks very much for pointing me in the right directions. I really appreciate it.