My "/" rootfs was 28 Mo free (over 228 Mo) before upgrading to CSSU thumb.
/var/lib/dpkg is 44 Mo heavy
I have deleted "/var/log/lastlog" - 8 Mo, probably lacks rotation. And also remove "/lib/modules/2.6.28.NIT.06" and /boot/multiboot/vmlinuz-2.6.28.NIT.06" (1.8 Mo)
Is it safe to remove "old" files from /var/lib/dpkg and /var/lib/apt ? (as far as I have a full backup)
I will now replay installation on my QA system... before production.
Thanks