By the way, the installation works fine if I change the preseed template to choose the following recipe rather than the expert one:
d-i partman-auto/choose_recipe \ select All files in one partition (recommended for new users) -- Can't have a partition outside the disk when preseeding Feisty herd 4 on Asustek Z62J https://launchpad.net/bugs/86509 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs