vnc issue after 11.1 update

Hope this is the right forum.

I just (25 Nov 2010) updated my OpenSuSE 11.1 (KDE 3) Xen domain host and OpenSuSe 11.1 (KDE 3) domain guest. They were both working normally pre-update but now I cannot connect to the guest via VNC as previously. It is some 3 or 4 months since I last updated.

The Xen host seems fine. Also the Netware guest is fine.

The machine is a headless 64-bit Intel CPU with 4GB RAM.

The symptom is that I launch the vnc shortcut on my Windows desktop and get the guest login screen OK. I next enter the login credentials and the connection closes.

If I enter a garbage password it stays open and reports a failed login. It doesn’t matter if I try root or my own login.

In the Xen host virtmanager I can open a connection to the guest successfully.

I don’t know where to start looking so I would really appreciate any hints