I have given up on the 64 bit version and gone with the 32bit. I have a feeling that the problem was caused by me attempting to use xfs for the root partition and ext3 for the /boot partition.
-- Error on install of kubuntu 64 bit https://launchpad.net/bugs/47908 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs