apt-get (debconf) throws strange errors while upgrading libpam0g Debian lenny package

[rainmailbox2001-ola@yahoo.ca]

Hi.
I was just trying to install today's updates for Debian lenny
(testing), and debconf throws these errors at me while upgrading
libpam0:

Preconfiguring packages ...
Setting up libpam0g (1.0.1-2) ...
Checking for services that may need to be restarted...Checking init scripts...
debconf: Unable to load Debconf::Element:Dialog::String.
Failed because: Can't locate Debconf/Element/Dialog/String.pm in @INC
(@INC contains: /etc/perl /usr/local/lib/perl/5.10.0
/usr/local/share/perl/5.10.0 /usr/lib/perl5 /usr/share/perl5
/usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl .) at
(eval 24) line 2, <GEN1> line 4.
BEGIN failed--compilation aborted at (eval 24) line 2, <GEN1> line 4.

Can't locate object method "new" via package "Debconf::Element:Dialog::String" (perhaps you forgot to load "Debconf::Element:Dialog::String"?) at /usr/share/perl5/Debconf/FrontEnd.pm line 68, <GEN1> line 4.
dpkg: error processing libpam0g (--configure):
subprocess post-installation script returned error exit status 2
Errors were encountered while processing:
libpam0g
E: Sub-process /usr/bin/dpkg returned an error code (1)


Any suggestions?