Comment 17 for bug 45989

This does not appear to be a bug in grub-installer. The disks changing identifiers is not a bug and is the reason for the use of UUIDs instead of device names. If grub legacy did not correctly add entries to boot the system found on the other disk, that would be a bug there, but grub legacy is no longer being developed. Using grub2, which has been the default for new installs since Karmic, should handle this fine.