Comment 2 for bug 215175

Reassigning, that's because grub-pc fails with the following error (translated from Portugese):

Installing grub-pc (1.95+20070604-1ubuntu1) ...
Generating core.img
grub-probe: error: unknown filesystem
Auto-detection of a filesystem module failed.
Please specify the module with the option `--modules' explicitly.
dpkg: error processing grub-pc (--configure):
 subprocess post-installation script returned error code 1
dpkg: dependency problems prevent configuration of startupmanager:
 startupmanager depends on grub; but:
  Package grub is not installed.
  Package grub-pc, which supplies grub is not yet configured.
dpkg: error processing startupmanager (--configure):
 dependency problems - leaving unconfigured