Comment 2 for bug 387112

Here is what is causing the error:

Unpacking replacement libpam0g ...
Setting up libpam0g (1.0.1-4ubuntu5.5) ...
Checking for services that may need to be restarted...Checking init scripts...
debconf: Unable to load Debconf::Element::Gnome::String. Failed because: Can't locate I18N/Langinfo.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.8.8 /usr/local/share/perl/5.8.8 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.8 /usr/share/perl/5.8 /usr/local/lib/site_perl .) at /usr/share/perl5/Debconf/Element/Gnome.pm line 7, <GEN1> line 4.
BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Element/Gnome.pm line 7, <GEN1> line 4.
Compilation failed in require at (eval 23) line 3, <GEN1> line 4.
        ...propagated at /usr/share/perl/5.8/base.pm line 84, <GEN1> line 4.
BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Element/Gnome/String.pm line 10, <GEN1> line 4.
Compilation failed in require at (eval 22) line 2, <GEN1> line 4.
BEGIN failed--compilation aborted at (eval 22) line 2, <GEN1> line 4.

Can't locate object method "new" via package "Debconf::Element::Gnome::String" at /usr/share/perl5/Debconf/FrontEnd.pm line 68, <GEN1> line 4.
/usr/share/debconf/confmodule: line 42: printf: write error: Broken pipe
/usr/share/debconf/confmodule: line 42: printf: write error: Broken pipe
dpkg: error processing libpam0g (--configure):
 subprocess post-installation script returned error exit status 2

It seems to be a problem with the gnome frontend of debconf crashing.