First try failed.
Second time round I noticed on the apt-get update it came up with a medibuntu gpg error and a missing packages.gz. So I copied these from the Core and rerun apt-get update and it finished
I didnt install the nvidia-glx-260.
I ran upgrade and it told me something about Flash having unmet dependencies. I ran apt-get install -f and this fixed that.
I ran apt-get upgrade and told me there was nothing.
I booted the MD and it came up with the kubuntu logo for ages.
When I ssh'ed to the MD i could see it was installing nvidia-glx-260 automatically and was installing kernel-headers. After a long time the md rebooted and came up with the av wizard. I will run that and the install over night and post the outcome in morning.