Bug#514808: update-grub goes wrong

[Jonny]

Package: grub-pc
Version: 1.96+20080724-15
Severity: grave

/usr/sbin/update-grub fails in the portions of /etc/grub.d/10_freebsd:
 Setting up grub-pc (1.96+20080724-15) ...
 Updating /boot/grub/grub.cfg ...
 .: 22: Can't open /usr/lib/grub/grub-mkconfig_lib
 dpkg: error processing grub-pc (--install):
  subprocess post-installation script returned error exit status 2