Bug#647056: Could not perform immediate configuration on 'perl'

[Stelios]

Package: perl
Version: 5.10.1-17squeeze2
Severity: important


Clean debian 6.0.3 installation. As far only squeeze repo is enabled everything is ok. When I enable testing repo to upgrade my kernel then I when I try to install something which depends on perl (e.g build-essentials packet) I get "E: Could not perform immediate configuration on 'perl'"

-- System Information:
Debian Release: 6.0.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.0.0-1-686-pae (SMP w/2 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages perl depends on:
ii  libbz2-1.0             1.0.5-6           high-quality block-sorting file co
ii  libc6                  2.13-21           Embedded GNU C Library: Shared lib
ii  libdb4.7               4.7.25-9          Berkeley v4.7 Database Libraries [
ii  libgdbm3               1.8.3-9           GNU dbm database routines (runtime
ii  perl-base              5.10.1-17squeeze2 minimal Perl system
ii  perl-modules           5.10.1-17squeeze2 Core Perl modules
ii  zlib1g                 1:1.2.3.4.dfsg-3  compression library - runtime

Versions of packages perl recommends:
ii  netbase                       4.45       Basic TCP/IP networking system

Versions of packages perl suggests:
pn  libterm-readline-gnu-perl | l <none>     (no description available)
pn  make                          <none>     (no description available)
pn  perl-doc                      <none>     (no description available)

-- no debconf information