Bug#562043: [grub-pc] Error during installation

[giagimari at libero.it]

Package: grub-pc
Version: 1.98~20091221-1

Error during installation:

Setting up grub-common (1.98~20091221-1) ...
Setting up grub-pc (1.98~20091221-1) ...

Creating config file /etc/default/grub with new version
Installation finished. No error reported.
Installation finished. No error reported.
Installation finished. No error reported.
Installation finished. No error reported.
Generating grub.cfg ...
Found background image: moreblue-orbit-grub.png
Found linux image: /boot/vmlinuz-2.6.32.2-my001
Found initrd image: /boot/initrd.img-2.6.32.2-my001
Found linux image: /boot/vmlinuz-2.6.32-trunk-amd64
Found initrd image: /boot/initrd.img-2.6.32-trunk-amd64
Found linux image: /boot/vmlinuz-2.6.31.9-my001
Found initrd image: /boot/initrd.img-2.6.31.9-my001
Found memtest86+ image: /boot/memtest86+.bin
/etc/grub.d/30_os-prober: 40: function: not found
dpkg: error processing grub-pc (--configure):
 subprocess installed post-installation script returned error exit status 127
Errors were encountered while processing:
 grub-pc
E: Sub-process /usr/bin/dpkg returned an error code (1)