Upgrade exim4 to bpo version??

[palme@uni-wuppertal.de (Hubert Palme)]

Hi all,

it seems to be a new phenomenon in Debian:

# apt-show-versions -u|sort
exim4-base/sarge-backports upgradeable from 4.50-8sarge2 to 4.61-0bpo1
exim4-config/sarge-backports upgradeable from 4.50-8sarge2 to 4.61-0bpo1
exim4-daemon-light/sarge-backports upgradeable from 4.50-8sarge2 to 4.61-0bpo1
exim4/sarge-backports upgradeable from 4.50-8sarge2 to 4.61-0bpo1
eximon4/sarge-backports upgradeable from 4.50-8sarge2 to 4.61-0bpo1
glibc-doc 2.3.2.ds1-22sarge3 newer than version in archive
...
libc6 2.3.2.ds1-22sarge3 newer than version in archive
libc6-dev 2.3.2.ds1-22sarge3 newer than version in archive
libdbd-pg-perl 1.42-0sarge1 newer than version in archive
libperl5.8 5.8.4-8sarge4 newer than version in archive
locales 2.3.2.ds1-22sarge3 newer than version in archive
...
perl 5.8.4-8sarge4 newer than version in archive
perl-base 5.8.4-8sarge4 newer than version in archive
perl-modules 5.8.4-8sarge4 newer than version in archive
perl-suid 5.8.4-8sarge4 newer than version in archive
tar 1.14-2.2 newer than version in archive
#

Particularly annoyimg: exim4 wants to be upgraded to the bpo version. Is
there any cogent reason to do this? (On the other hand: "Never touch a
running system" :-) -- and having an MTA configured correctly isn't
trivial at all!)

Does anyone know why this now happens so often? Have all those
packages been repacked for r2 with a lower version number? (why?) Does
it make sense to "downgrade"?

Thanks in advance for any hint...

a trifle bemused,
HP.

-- 
================================================================
Dipl.-Math. Hubert Palme        Bergische Universitaet Wuppertal
Zentrum fuer Informations-               
und Medienverarbeitung (ZIM)           D-42097 Wuppertal
E-Mail: palme@uni-wuppertal.de             (Germany)