Yeah, all in the latest version. World was created in the latest version, too, of course.
Was just able to reproduce it... sort of. I still don't know exactly what causes it, so I can't really reproduce it in a helpful way. I suppose you could say I just ran into it again.
I tried to do everything I did last time. I started a human adventurer, got a quest at a town -- I'd forgotten that until I set out to reproduce it, but I'd done that before, although I ended up ignoring the quest completely -- then set out in the other direction. This time, after wandering a bit in travel mode, I turned travel mode off and ended up following a river (more like a brook) into the mountains. Lots of wandering again, then something weird happened. I came to a point where the river just sort of... stopped. There was no wall or stone that I could see, just solid blackness that I couldn't look or walk into.
I saved my game and decided to report that oddness (although maybe it's how rivers are supposed to start for now, for all I know), then thought I'd go back into the game to try following the river from the hills above first (it sort of cut into a mountain, but the mountain was climbable using slopes -- did I mention that before? I was climbing mountain slopes last time. Well, I suppose it's obvious given how I found the chasm.)
And the game loaded successfully. Yeah. This is the creepiest part.
But after the game loaded successfully, I changed my mind and thought I'd go back up my save first. So, without doing anything else (well, maybe I took one or two steps, and tried to look at the blackness), I saved my game, backed it up, then loaded it up again.
Bam. Corrupted save, same message. And, of course, since I backed it up at the wrong point (sorry!), my backup is corrupted, too.
This time I have the unmodified, unchanged world from just after creation backed up at least, though. Dunno if that'll help, but I'll load it up and see if I can find the same place again and reproduce it.
[ February 12, 2008: Message edited by: Aquillion ]