Comment 2 for bug 618012

Thank you for your report.

The relevant error is:
Setting up scrollkeeper (0.3.14-15ubuntu1) ...

Installing new version of config file /etc/cron.monthly/scrollkeeper ...

Rebuilding the database. This may take some time.

///usr/share/gnome/help/blackjack/el/blackjack.xml:402: parser error : Entity 'Βοήθεια' not defined

                  <para><guimenuitem>Προτιμήσεις&Βοήθεια;</gui

                                                                           ^

dpkg: error processing scrollkeeper (--configure):

 subprocess post-installation script killed by signal (Interrupt)

which was reported and fixed in bug 221781. Could you please provide the output of the command:
$ apt-cache policy gnome-games