Ouch, debconf stopped working

[Nico De Ranter <nico@sonycom.com>]

Ok, ok, I know I should have known better. I upgraded to
unstable/testing some time ago, a few days ago I noticed
X4.x was finaly in unstable so I upgraded again. Only to
find out debconf can't live with a recent perl upgrade.
Now the only thing I get is something like:

Setting up nis (3.9-4) ...
Can't modify goto in lvalue subroutine return at /usr/share/perl5/Debconf/Base.pm line 24, near "}"
Compilation failed in require at (eval 4) line 3.
	...propagated at /usr/share/perl/5.6.1/base.pm line 18.
BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Iterator.pm line 5.
Compilation failed in require at /usr/share/perl5/Debconf/Question.pm line 7.
BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Question.pm line 7.
Compilation failed in require at /usr/share/perl5/Debconf/Config.pm line 5.
BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Config.pm line 5.
Compilation failed in require at /usr/share/perl5/Debconf/Log.pm line 8.
Compilation failed in require at /usr/share/perl5/Debconf/Db.pm line 5.
BEGIN failed--compilation aborted at /usr/share/perl5/Debconf/Db.pm line 5.
Compilation failed in require at /usr/share/debconf/frontend line 22.
BEGIN failed--compilation aborted at /usr/share/debconf/frontend line 22.
dpkg: error processing nis (--configure):
 subprocess post-installation script returned error exit status 255
Errors were encountered while processing:
 nis

Unfortunately I can't remove perl since it is kind of
vital :-). And it doesn't seem to be possible to reinstall
perl because then apt-get tells me perl is already
up-to-date.  Dito for the debconf package.

Any ideas? I'm kind of lost here :-(

Thanks in advance,

Nico

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Nico De Ranter
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e-mail: nico.deranter@sonycom.com