Well shoot, I get the same thing.
I'm going to fire up the Ye Olde Celeron and see if I have a working copy saved somewhere.
EDIT: See, I knew never deleting any files and keeping all of my old computers set up and accessible at any moment would pay off some day! (Heh...)
I replaced the file with a working version, but I don't think it's the most up to date version. The readme speaks of a "monster patch" which I can't seem to find, although I'm reasonably sure I installed it when I played it years ago. The game's still installed and working on my old machine though, so if it comes down to it I can just ZIP it up and throw it up there.