Five months after RTM, Microsoft has released the April 2007 Cumulative Update for Media Center for Windows Vista.
You’ll find several bug fixes and a few improvements, including Online Media support for 64-bit systems. My experience with Media Center rollups has been good, but your mileage may vary. Robert McLaws says he had some problems with IE7 and Outlook 2007 after installing it, so caution is, as always, in order.
This one is being delivered as a Recommended update, so if you check Windows Update on a supported system (Vista Home Premium or Ultimate), you’ll see it in the list of available updates.