A non-Xen installation of Lucid with grub-installer/grub2_instead_of_grub_legacy=false apt-setup/proposed=true (I applied both of those to the Xen test as well, just forgot to mention the first one) still works fine.
A non-Xen installation of Lucid with grub-installer/ grub2_instead_ of_grub_ legacy= false apt-setup/ proposed= true (I applied both of those to the Xen test as well, just forgot to mention the first one) still works fine.