According to the BusinessofVideo.com blog, Microsoft is shaking up its audio- and video-software business:

Today, Microsoft made some major company changes in multiple divisions of their business. Some long time execs including Amir Majidimehr and others are affected and multiple divisions have been reorged. Lots of changes that will affect multiple product lines. I expect we'll see the changes announced shortly, if not tomorrow.
Majidimehr, who's been in charge of big parts of Microsoft's multimedia strategy over the years, may be paying the price for letting the software giant get overtaken in online video. The rise of Adobe's Flash as the online-video technology of choice for sites like YouTube has made Microsoft's Windows Media largely irrelevant.