The framework seems to be broken in the latest release.  The error I am getting is:

Cannot find type Windows.UI.Xaml.Media.Video3DMode in module ....

Apparently this should now be:  Stereo3DVideoPackingMode.

Actually I should have mentioned that this is with the latest RC version of the OS -  [Version 6.2.8375]

As newer versions of Windows are publically released, we will be updating CodePlex with compatible versions. Please contact the folks on the Win8 team for details about how to get preview drops compatible with private releases.

Regards,

Tim

Update: Today we publically released a version compatible with the new Release Preview version of Windows 8.

Enjoy!