--Sorry about that - I left the .ovf file in as it was part of the original appliance before my customizations.
Try deleting these 2 files:
163 May 18 2012 Ubuntu-12.04-LTS-Jeos-1.0.mf
5816 May 18 2012 Ubuntu-12.04-LTS-Jeos-1.0.ovf
--The VM should be imported using the .vmdk files, not the .ovf -- please let me know if this succeeds.