I should say I never had it working, I've always scanned using transponder lists.
When I try to blindscan I get the spinning wheel of death and need to force close. Presumably there's a blindscan interface of some sort but it freezes before I see it.
Running RC1 I think (sorry not at home!) and using a TBS5922se with bda.dev on Win7.
I assume I'm doing something wrong but what is it ?