apt-get

[Xa <xavier.hubin@aix17.segi.ulg.ac.be>]

sorry de vous importuner
mais mon peu d'experience de apt me laisse bloqué sur ce probleme
Quoi que j'essaie d' "apt-geter" il me resert cette erreur:


Reading Package Lists... Done
Building Dependency Tree... Done
Correcting dependencies... Done
The following extra packages will be installed:
  gnome-bin
1 packages upgraded, 0 newly installed, 0 to remove and 601  not upgraded.
13 packages not fully installed or removed.
Need to get 0B/79.5kB of archives. After unpacking 1343kB will be used.
Do you want to continue? [Y/n] y
(Reading database ... 125707 files and directories currently installed.)
Preparing to replace gnome-bin 1.2.13-4 (using 
.../gnome-bin_1.2.13-ximian.8_i386.deb) ...
Unpacking replacement gnome-bin ...
dpkg: error processing 
/var/cache/apt/archives/gnome-bin_1.2.13-ximian.8_i386.deb (--unpack):
 trying to overwrite `/usr/share/man/man1/gnome-pty-helper.1.gz', which is 
also in package libzvt2
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/gnome-bin_1.2.13-ximian.8_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

comment puis-je ravoir mon apt-get en bon etat de marche? 

merci de votre aide :)