Definitely not the kernel. Preseed and installer kernels are identical. It shows 80G drive.
I'd guess maybe the installer is passing the wrong values in to parted. ** Changed in: debian-installer (Ubuntu) Sourcepackagename: linux-source-2.6.20 => debian-installer -- 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