I got this dialog ->
Could not install '/var/cache/apt/archives/libpam-modules_1.1.3-2ubuntu1_i386.deb'
The upgrade will continue but the '/var/cache/apt/archives/libpam-modules_1.1.3-2ubuntu1_i386.deb' package may not be in a working state. Please consider submitting a bug report about it.
'./usr/share/man/man8/pam_shells.8.gz' is different from the same file on the system
and now I have this dialog on screen ->
Could not install the upgrades
The upgrade has aborted. Your system could be in an unusable state. A recovery will run now (dpkg --configure -a).
This doesn't look good ... :-(