A new update for Media Center in Windows Vista will be released through Windows Update this week. Among the fixes listed are:
• Several issues that are related to the Media Center Extensibility Platform
• An issue that affects digital cable card components when you use Scientific Atlanta cable cards
• Interaction issues that occur between Media Center PC and Microsoft Xbox 360 when Xbox 360 is used as a Media Center Extender.
• Autolaunch issues that occur with video CD (VCD) media
The relevant KB article can be found here:
October 2007 Cumulative Update for Media Center for Windows Vista