Quoting Rick Thomas (rbthomas@pobox.com):
PS: Is anybody working on this bug? It would be a shame if it got
into beta2... I'd be happy to take a look and see if I could find
anything, but I don't know where to look. Can somebody point me in
the right direction? Thanks in advance!
No. So far, nobody is actively woking on grub-related bugs.
Most of them probably belong to grub-installer....or the grub package
itself.
Sorry for not being very precise, but all this has often been some
kind of black magic to me (or more precisely, something I never
worked on).