problème de mise à jour du noyau

[steve <dlist@bluewin.ch>]

Salut la liste,

le 'aptitude safe-upgrade' matinal me retourne une erreur :

Paramétrage de linux-image-2.6.26-1-amd64 (2.6.26-8) ...
Running depmod.
Running mkinitramfs-kpkg.
Not updating initrd symbolic links since we are being
updated/reinstalled
(2.6.26-5 was configured last, according to dpkg)
Not updating image symbolic links since we are being updated/reinstalled
(2.6.26-5 was configured last, according to dpkg)
Running postinst hook script /usr/sbin/update-grub.
Searching for GRUB installation directory ... found: /boot/grub
User postinst hook script [/usr/sbin/update-grub] exited with value 1
dpkg : erreur de traitement de linux-image-2.6.26-1-amd64
(--configure) :
 le sous-processus post-installation script a retourné une erreur de
 sortie d'état 1


Impossible de passer outre. 

Une idée ?

Merci d'avance
Steve