These problems that you guys are describing sound exactly like my problems. No, it doesn't seem to be related to the soundcard... This just totally has me stumped!
I'm using Windows XP with all of the latest updates. How about you guys?
I've tested this as a vst plugin in FL Studio (don't laugh, it's actually pretty awesome) and in a vst host that I have... I've also tried this stand-alone, and I'm getting no luck. The thing that I find most peculiar though about the crashes is that if I ignore the error message, I can keep tweaking volume sliders and the like... The interface does not lock up, like you'd normally see in crashes.
I hate not being able to find a solution to a problem!