New KB-article released;
http://support.microsoft.com/default.aspx?scid=kb;en-us;969774&sd=rss&spid=13952
Fixes include;
When the Microsoft Application Virtualization 4.5 client tries to perform a DC refresh over HTTP or over HTTPS on an IPv6 network, the DC refresh is not completed successfully.
If the %APPDATA% environment variable expands to a UNC path, virtual applications may not always start with application-specific failures.
In environments that have a trust relationship and mapped user accounts between Windows Domain and an MIT Kerberos realm, the Microsoft Application Virtualization 4.5 client cannot log on to a publishing server. Additionally, you receive error 8009030C. You can enable this fix by creating the registry value UseMITKerberos.