Microsoft has released the June 2007 Cumulative Update for Media Center for Windows Vista.  I am installing this as I type, so I will update on how it gets on.

It is available on Windows Update and can also be downloaded directly from Microsoft

thanks Mike at Missing Remote for the heads up

 

Hotfix replacement information

This is a cumulative update. This update replaces the following updates:

929011 (http://support.microsoft.com/kb/929011/) Windows Media Center does not correctly configure a combo TV tuner that supports both ATSC and NTSC signals on a Windows Vista-based computer

932753 (http://support.microsoft.com/kb/932753/) When you resize the Windows Media Center window in Windows Vista, video playback may stop

932818 (http://support.microsoft.com/kb/932818/) April 2007 Cumulative Update for Media Center for Windows Vista

931967 (http://support.microsoft.com/kb/931967/) You cannot hear the audio in Live TV or on a DVD in Windows Media Center after you wake a computer that is running Windows Vista Home Premium or Windows Vista Ultimate

Issues that are resolved by this update

In addition to the fixes that are contained in the updates that are listed in the "Hotfix replacement information" section, the June 2007 Cumulative Update for Media Center for Windows Vista includes the following updates:

•Several fixes for the Media Center Extensibility Platform

•An update to the Digital Cable Card component to provide better support for interaction between the digital cable tuner, the CableCARD, and Media Center