I recently (P2982) had the case where Lotus Agenda catapulted the date on my HP 200 LX back to 1985. I've now figured out what caused it. The funny thing about it: I had the same problem with Think Tank. In both cases, the date in the settings file was to blame - it didn't have a valid date and the PDA simply assumed 1985. And apparently when accessing such a file, the HP has a problem and resets the system date. After I updated the Think Tank options file and the environment file in Lotus Agenda with touch to a current date, everything works. Finally got an organizer with really sensible software. Really, I'm only missing Word 5.0 (the only truly good program from Microsoft) and the organizer would be pretty much perfect. Okay, Microsoft Works 1.0 is also acceptable, but a bit lean on features.
I'll see if I tackle some installation attempts of Visual Basic for DOS this evening, another crazy piece of software I have lying around here (I think I still have DBase IV somewhere too, while we're talking about crazy stuff).