Today (at approximately 10:00 AM PST) our team released an update to the Silverlight 4 runtime. This update, dubbed internally as "GDR3," provides an update in the following key areas (KB2495644):
Timestamp issues with media playback and VC-1 codec Visual Studio IDE crash when profiling a Silverlight application which has a pixel shader Enabling Silverlight to run as a 32-bit process in 64-bit Firefox on OSX DRM fixes for a "6207" error when playing protected content after upgrading to a version of Silverlight Memory leak fixes with regard to the use of in-line DataTemplate Out-of-browser applications failing to update if the application name was changed Media playback error when the media streams have redirect information Improving network latency (Go to the complete details ...