Installing grub onto a system with XFS root fs

[Jason White <jason@jasonjgw.net>]

I am trying to install Grub onto a system with a single XFS partition serving
as both / and /boot.

Distribution: Debian Unstable (Sid).
Architecture: x86_64

When I run grub-install I get:
Searching for GRUB installation directory ... found: /boot/grub
Due to a bug in xfs_freeze, the following command might produce a segmentation
fault when /boot/grub is not in an XFS filesystem. This error is harmless and
can be ignored.

At this point the install script hangs and the only way to recover is to
reboot the machine (with a hard reset). Needless to say, Grub isn't installed.

Any suggestions?

Note that the installation of grub failed during the Debian installation
process for a reason that wasn't specified (no helpful error message).

I have an x86 "live CD" with grub available if that will help, but it isn't
x86_64.

Thanks.