Hi, all. For closure's sake, here's an update/solution(ish). I think the problem is network-related, since running the program with my wifi disabled has removed the crashes completely. I don't know more than that, but since the game doesn't have network features anyway (boo) it's simple enough to do. Thanks for the input, etc!
As an aside, I added SF2:V to my install, so it appears the sickness is progressing nicely...
DoctorDrago's post in SF2 Israel Random CTD was marked as the answer