Bug#473209: Same with md devices

[Loïc Minier]

        Hey,

 I get such a regression as well with boot on md:
    /dev/md0 on /boot type ext3 (rw,noatime)

Paramétrage de linux-image-2.6.24-1-686 (2.6.24-5) ...
Running depmod.
Finding valid ramdisk creators.
Using mkinitramfs-kpkg to build the ramdisk.
Not updating initrd symbolic links since we are being updated/reinstalled 
(2.6.24-4 was configured last, according to dpkg)
Not updating image symbolic links since we are being updated/reinstalled 
(2.6.24-4 was configured last, according to dpkg)
Running postinst hook script /usr/sbin/update-grub.
Searching for GRUB installation directory ... found: /boot/grub
grub-probe: error: Cannot get the real path of `/dev/sdb'
User postinst hook script [/usr/sbin/update-grub] exited with value 1

 fstab:
    /dev/md0        /boot           ext3    noatime         0       2
    /dev/mapper/bee--raid1-debian--root / ext3    noatime,errors=remount-ro 0       1

/boot/grub/device.map:
(hd0)   /dev/sda
(hd1)   /dev/sdb

 menu.lst:
#groot=(hd0,0)

-- 
Loïc Minier