upgrading from 11.04 to 11.10 failed on grub symbol not found grub_divmode64_full

[uMac]

upgrade went ok, after reboot I got to grub rescue which said
 symbol not found grub_divmode64_full.

I could not recover by following quides hot to load kernel by insmod linux.mod, not helped grub-install to partition from live CD.
I just had to revert my HDD by cloning back to state before upgrade.

Please advice how to upgrade?
my configuration is
HW: Mac book pro 7.1
Dual Boot with EFI bootloader.
Grub installed on partition 3 on main HDD together with Linux system.

I was thinking about reinstalling but my home is on separate encrypted partition and don;t know how to do clean installation and restore setup with existing home folder.

Thnaks for advice.

Stan

[uMac (uvaio)]

Hi guys, has anyone got some advice or workaround for this issue?
Thanks

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for grub2 (Ubuntu) because there has been no activity for 60 days.]