Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-2.6.32-5-xen-amd64.postinst line 799

grub-mkdevicemap
grub-mkconfig
update-grub
aptitude safe-upgrade

http://www.linuxquestions.org/questions/debian-26/update-problem-870114/

http://www.adminsehow.com/tag/xen/