Comment 267 for bug 1289977

> Then your 14.10 install did not install grub correctly ( i.e. it
> failed to install, or installed it to a place your system did not
> actually boot from ), leaving the previous grub install you had to try
> and fail to boot.

Which confirms there's a bug somewhere.

> The bottom line is that this message happens because you have one
> version of grub in your MBR, and a different version in your /boot
> directory.

Which is something that should never happen no matter what. The very fact that this can happen is _the_ bug (unless, of course, one manually runs a command to purposefully create that situation, with some kind of --force option or after answering "yes" to a warning prompt).

Assuming that your diagnosis is correct, that is. Of which I am not completely sure, given that you have a history of negating facts (as in "I haven't seen anyone report this on a fresh install").