That's a new one for me, Eric. Try clearing cookies and temporary Internet files, verifying the IE is the default browser, and that IE is not set to automatically detect settings for the connection/proxy. Failing all of that, contact support -
Support for 2.0 Beta - http://help.live.com/help.aspx?project=onecarev2 - use the "Get More Help" link in the lower right of the page to contact support via email.
-steve