In *this* instance, this was a self-inflicted wound. ^.^;
I had created a couple of .ogg files for the purpose of replacing a handful of certain sound FX within the game that kind of grate on my nerves. The FX overrides live in /data/sound/ogg. I wanted to store my original .ogg files somewhere close, as I imagine I'll want to copy them again in future, so I created a new directory in /data/sound called "sourcefiles" and put them there. And then didn't think anything else of it.
This morning, when I tried to launch the game, it threw a "Program error" at me:
Unhandled exception: page fault on read access to 0x00000000 in 32-bit code
After a bit of digging and a lot of trial and error (& error & error &c.) I narroed it down to my new sound directory. Removing it removed the Program error.
While this might never specifically apply to any other errors, it might be a clue in helping figure them out.
Have fun y'all!
-S