imho this is totally unrelated to #498686 I have ASUS A6Km (which has a crappy bios by the way and asus does not seem to care at all) My HDD is and IDE drive and in 2.6.18 it was /dev/hda some kernels later it became /dev/sda (I amnot sure when this change happened, but I am sure it was a 2.6.2x kernel). Since 2.6.26-1-686 version -5 the hard drive is /dev/hda again.
Therefore /etc/fstab and /boot/grub/menu.lst need to be changed manually. If you are using uswsusp, you also have to edit /etc/initramfs-tools/conf.d/resume and run dpkg-reconfigure uswsusp If you have some encrypted partitions as I have, it is a good idea to also check out /etc/crypttab This is very likely related to this in the changelog: [ Bastian Blank ] * Reenable SiS SATA support. (closes: #496603) because my IDE bus is 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 01)