I think I can tentatively declare myself healthy again. The coffee is even reasonable tasting (yesterday it tasted like dishwater). There's still a bit of a throbbing behind one temple, and every few minutes I have the urge to lie down, but all in all I seem to be human again.

Had a flash a few hours ago while trying to sleep, realised it would be easier for the users to track down the problem with 3500-2 if I gave them a snapshot of summary values at the moment of failure. Going to try doing that now.