Openfire & SSO in Active Directory 2008 Environment

Has anyone managed to get SSO to work in an environment with Active Directory 2008? I can get the Openfire to connect and authenticate via AD, but when I try to setup SSO, it just get the “Unable to connect using Single Sign-On. Please check your principal and server settings.” message. I’ve followed the documentation for SSO step by step and cannot get this to work. I’m not sure if this is an issue with 2008 AD or something else. Any ideas?

I just upgraded to an AD 2008 from 2003 and now SSO fails. Did you ever figure this out?