Bug#547944: Still unbootable

[Yitzchak Gale]

After running upgrade-from-grub-legacy, my system
is unbootable.

I don't recall whether I saw such a checkbox, or if I
did, whether I checked it. So I am replying to this
bug rather than opening a new one on the chance
that this is the same issue.

I tried reconfiguring grub-pc, reinstalling grub-pc,
and downgrading to grub-legacy (as suggested
in this bug), but none of those had any effect.
My system is still unbootable, with "Error 15"
showing on the bios boot screen.

On my system, the CD is connected to the first
IDE bus and my hard disks to the second. I have
the following partitions:

/dev/hdb1 - the root partition
/dev/hdb2 - extended partitions
/dev/hdb5 - swap
/dev/hdb6 - /home

Perhaps the MBR was written incorrectly
by update-from-grub-legacy, then not written
at all by the installation of grub-legacy in my
case?

Anyway, I'm desperately stuck, can anyone help
me get my system to boot?

Thanks,
Yitz