What version of libpam-runtime do you have installed on this system?
What do you see as console output if you run DEBCONF_DEBUG=developer dpkg-reconfigure libpam-gnome-keyring in a terminal as root?
What version of libpam-runtime do you have installed on this system?
What do you see as console output if you run DEBCONF_ DEBUG=developer dpkg-reconfigure libpam- gnome-keyring in a terminal as root?