Sorry your having trouble, I'm having some other issues myself. I've never had that particular problem.
I'm noticing that RC2 seems to do things different, If I were you get RC1, I went back to it for my production setup. I'm still testing RC2 with a few PC's and I have all sorts of video stutters sound skips and Lirc doesn't work at all for me.
If you do take the time to throw RC1 on that PC please report back your progress, Thanks