samba 2:3.4.7~dfsg-2~bpo50+1 Error installing

[yvan <yvan@skywalker.is-a-chef.com>]

Hi everybody.

I upgraded my samba backport this morning from samba 2:3.4.7~dfsg-1 to 
the brand new samba 2:3.4.7~dfsg-2~bpo50+1

and I got an error with dpkg, marking winbind in error. What cause the 
error is the call to "pam-auth-update" as post-exec script, which is not 
found on the system.

I manually sorted the mess with that workaroud :

touch /usr/bin/pam-auth-update
chmod +x /usr/bin/pam-auth-update

aptitude install

rm /usr/bin/pam-auth-update

*******************
Here is what the upgrade gave me :

Setting up libwbclient0 (2:3.4.7~dfsg-2~bpo50+1) ...
Setting up samba-common (2:3.4.7~dfsg-2~bpo50+1) ...
Setting up winbind (2:3.4.7~dfsg-2~bpo50+1) ...
/var/lib/dpkg/info/winbind.postinst: line 16: pam-auth-update: command 
not found
dpkg: error processing winbind (--configure):
 subprocess post-installation script returned error exit status 127
Setting up samba (2:3.4.7~dfsg-2~bpo50+1) ...
Starting Samba daemons: nmbd smbd.
Setting up smbclient (2:3.4.7~dfsg-2~bpo50+1) ...
Setting up libtalloc1 (1.2.0~git20080616-1) ...
Setting up cifs-utils (2:4.1-1~bpo50+1) ...
Setting up smbfs (2:4.1-1~bpo50+1) ...
Setting up libsmbclient (2:3.4.7~dfsg-2~bpo50+1) ...
Setting up samba-common-bin (2:3.4.7~dfsg-2~bpo50+1) ...
Setting up samba-doc (2:3.4.7~dfsg-2~bpo50+1) ...
Errors were encountered while processing:
 winbind
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:



Just to let you know the package is broken at the moment

Yvan Broccard