Bug#432757: Upgrade is impossible. Conflicts with lib32z1 package

[Nicolas DEGAND <nicolas@degand.net>]

Package: libc6-i386
Version: 2.5-11
Severity: serious

--- Please enter the report below this line. ---

When I try to upgrade from 2.5-11 to 2.6-2, it fails as it tries to replace 
the folder /usr/lib32 which is owned by lib32z1 :

Dépaquetage de la mise à jour de libc6-i386 ...
dpkg : erreur de traitement 
de /var/cache/apt/archives/libc6-i386_2.6-2_amd64.deb (--unpack) :
 tentative de remplacement de « /usr/lib32 », qui appartient aussi au paquet 
lib32z1
Des erreurs ont été rencontrées pendant l'exécution :
 /var/cache/apt/archives/libc6-i386_2.6-2_amd64.deb


--- System information. ---
Architecture: amd64
Kernel:       Linux 2.6.21-2-amd64

Debian Release: lenny/sid
  500 unstable        www.debian-multimedia.org 
  500 unstable        ftp.de.debian.org 
    1 experimental    ftp.de.debian.org 

--- Package information. ---
Depends       (Version) | Installed
=======================-+-===========
libc6         (= 2.6-2) | 2.5-11


-- 
Nicolas DEGAND