Hi John,
we should be able to be run Premium Beta on Windows 8 Consumer Preview. In the error message, does it mention the dll name?
could you run devenv with the /log switch. After you get the error, could you send me %APPDATA%\Microsoft\VisualStudio\11.0\ActivityLog.xml ( Windows Key + R, specify the path %APPDATA%\Microsoft\VisualStudio\11.0)
Also, could you zip up and send me the file %temp%\log dd_vs_premium_<date><someNumber> e.g. dd_vs_premium_20120210153801? Send to mikewong at microsoft.com.
much appreciated,
mike