Bug#672689: debian-installer: grub-pc failed to install into /target/

[Fab <usaegetta37-web@yahoo.com>]

Package: debian-installer
Severity: important
Tags: d-i

I'm using this CD installer
http://cdimage.debian.org/cdimage/weekly-builds/amd64/iso-cd/debian-wheezy-
DI-a1-amd64-xfce+lxde-CD-1.iso
11-May-2012 19:59  644M

Using the "expert" installation mode, the error message say:
The 'grub-pc' package failed to install into /target/ .
Without the GRUB boot loader, the installed system will not boot.



-- System Information:
Debian Release: 6.0.4
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash