I want to give a shout out to our Windows XP beta testers. Thanks to your reports, we were able to track down that issue that was causing it to frequently crash on some Windows XP setups.
As you can imagine, in 2012, it is difficult to replicate "real world" Windows XP systems. There's only so many uncles and aunts in the world to bother and after the...you know, "formatting" incident, I'm not allowed to visit.
Should go out in tonight's build.