Problemas con xlibs de woody

[Brainstorm <brainstorm@menta.net>]

Buenas gente ! Seré breve, tengo el siguiente problema:

Cuando intento instalar xlibs me sale el siguiente mensaje de error:

brainmachine:/# apt-get -f install xlibs
Reading Package Lists... Done
Building Dependency Tree... Done
The following NEW packages will be installed:
  xlibs
0 packages upgraded, 1 newly installed, 0 to remove and 0  not upgraded.

5 packages not fully installed or removed.
Need to get 0B/1167kB of archives. After unpacking 4850kB will be used.
(Reading database ... 19002 files and directories currently installed.)
Unpacking xlibs (from .../xlibs_4.0.2-1_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/xlibs_4.0.2-1_i386.deb
(--unpack):
 trying to overwrite /usr/X11R6/lib/X11/app-defaults', which is also in
package groff
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/xlibs_4.0.2-1_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


He probado a desinstalar el groff y borrar
/usr/X11R6/lib/X11/app-defaults, (pero este ultimo no existe !?).
Gracias por la ayuda !