Sorry. Couldn't help myself. This may actually indicate a change in direction with MS, given that Ballmer is finally history. I'll be in a wait and see mode with it. MS has a lot of history to get past before much of anything that they do will be welcomed with open arms by the open source communities.
Actually I think this move by Microsoft is excellent business and makes all kinds of sense. Ballmer was far too pig-headed to see it, but thank God he's gone.
I don't think it'll be more bugs for Linux and OS X -- I think it'll mean fewer for Windows, and that's good for everyone.