I can confirm this bug on my Dell Inspiron 530n (the FreeDOS version). Booted happily on Gutsy, but would not boot after upgrading to Hardy release version via update-manager.
Either adding "all_generic_ide" to GRUB *or* switching the SATA mode in the BIOS from "IDE" to "RAID" allowed it to boot normally.
kernel: 2.6.24-16-generic #1 SMP Thu Apr 10 12:47:45 UTC 2008 x86_64 GNU/Linux
dmidecode output: attached