Proxmox Open VNC Console not working on Lenny host

Testing Proxmox, it is installed on a laptop, with a minimal X11 install.  The "Open VNC Console" does not work, it opens a blank page.  This is due to Debian Lenny not having a IcedTea6 plugin.

To work around the issue, add a debian non-free repository to /etc/apt/sources.list and do:
#apt-get update
#apt-get update
#apt-get install sun-java6-jre sun-java6-plugin

Then remove the debian non-free line from sources.list and
#apt-get update