The Guys are closing in on what they think the stability problems are. Some discussion among the alpha team suggests that this problem (along with many others) might be solved in the next relase.

A temporary stop-gap measure might be to set reservecache to 8 in config.ini. That was something Mike had us alpha testers try to see if it solved any problems. I know it solved one (unrelated) problem I was having related to synchs, but I don't know if it will fix this one for you.