Public bug reported:

On the Oneiric testing system, I ran grub-install to reinstall grub for
Debian Lenny.

$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.10
DISTRIB_CODENAME=oneiric
DISTRIB_DESCRIPTION="Ubuntu oneiric (development branch)"

The version of grub:
$  dpkg -l |grep grub
ii  grub                            0.97-29ubuntu62                         
GRand Unified Bootloader (Legacy version)
ii  grub-common                     1.99-11ubuntu1                          
GRand Unified Bootloader (common files)


Debian Lenny is on /dev/sda:
$ parted -s /dev/sda print
Model: ATA VMware Virtual I (scsi)
Disk /dev/sda: 17.2GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type      File system     Flags
 1      32.3kB  354MB   354MB   primary   ext3            boot
 2      354MB   8587MB  8234MB  extended
 5      354MB   3381MB  3027MB  logical   ext3
 6      3381MB  4836MB  1456MB  logical   ext3
 7      4836MB  5338MB  502MB   logical   linux-swap(v1)
 8      5338MB  5601MB  263MB   logical   ext3
 9      5601MB  8587MB  2986MB  logical   ext3

The root partition of Debian Lenny is /dev/sda1, therefore:
1. mount /dev/sda1 /mnt/
2. ls -alFd /mnt/boot/grub/
drwxr-xr-x 2 root root 1024 2011-08-31 03:12 /mnt/boot/grub/

3. grub-install --no-floppy --root-directory=/mnt/ /dev/sda        
Installing GRUB to /dev/sda as (hd0)...

       [ Minimal BASH-like line editing is supported.   For
         the   first   word,  TAB  lists  possible  command
         completions.  Anywhere else TAB lists the possible
         completions of a device/filename. ]
grub> root (hd0,0)
grub> setup  --stage2=/mnt//boot/grub/stage2 --prefix=/boot/grub (hd0)
 Checking if "/boot/grub/stage1" exists... yes
 Checking if "/boot/grub/stage2" exists... yes
 Checking if "/boot/grub/e2fs_stage1_5" exists... yes
 Running "embed /boot/grub/e2fs_stage1_5 (hd0)"...  21 sectors are embedded.
succeeded
 Running "install --stage2=/mnt//boot/grub/stage2 /boot/grub/stage1 (hd0) 
(hd0)1+21 p (hd0,0)/boot/grub/stage2 /boot/grub/menu.lst"... failed

Error 6: Mismatched or corrupt version of stage1/stage2
grub> quit


After downgrading to the grub version on Natty, i.e. grub_0.97-29ubuntu61, it 
works:
$ dpkg -i grub_0.97-29ubuntu61_i386.deb
dpkg: warning: downgrading grub from 0.97-29ubuntu62 to 0.97-29ubuntu61.
(Reading database ... 21423 files and directories currently installed.)
Preparing to replace grub 0.97-29ubuntu62 (using grub_0.97-29ubuntu61_i386.deb) 
...
Unpacking replacement grub ...
Setting up grub (0.97-29ubuntu61) ...

root@oneiric:~# grub-install --no-floppy --root-directory=/mnt/ /dev/sda        
Installing GRUB to /dev/sda as (hd0)...
Installation finished. No error reported.
This is the contents of the device map /mnt//boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

(hd0)   /dev/sda
(hd1)   /dev/sdb

** Affects: grub (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/837815

Title:
  Grub 0.97-29ubuntu62 gives error "Error 6: Mismatched or corrupt
  version of stage1/stage2"

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