Comment 8 for bug 460192

Hmm, my last message was a trifle terse ...

The problem here is that we never found time to integrate the
grub-install implementation Agostino wrote, that would update the
wubildr image rather than the MBR. We'll need to do this to fix this
bug. I'm not yet sure whether it should be done directly in the grub2
packaging, or by diverting grub-install in lupin-support. The latter
would have zero chance of breaking non-Wubi installations, so is
nominally safer, but it would mean keeping track of grub-install's
interface and maybe chaining through to it when called in a way that the
Wubi version can't handle, so I want to think about this a bit.