some trouble in upgrade to gnome 2.4

[YuRiX <yurix@firenze.linux.it>]

i'm using the repository made by <fpeters@entrouvert.be> to begin
playing with gnome 2.4, but i have encountered this trouble during the
upgrade :

apt-get install  gnome-control-center libmetacity0 metacity 
Reading Package Lists... Done
Building Dependency Tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
 
The following packages have unmet dependencies:
  gnome-control-center: Depends: xlibs (> 4.3.0) but 4.2.1-12.1 is to be
installed
  libmetacity0: Depends: xlibs (> 4.3.0) but 4.2.1-12.1 is to be
installed
  metacity: Depends: xlibs (> 4.3.0) but 4.2.1-12.1 is to be installed
E: Broken packages

and when i specify the target distribution as experimental to solve the
dependency :
 apt-get -t experimental install  gnome-control-center libmetacity0
metacity
Reading Package Lists... Done
Building Dependency Tree... Done
The following extra packages will be installed:
  xbase-clients xfree86-common xlibs xlibs-data xlibs-dev
Suggested packages:
  twm x-window-manager
The following packages will be REMOVED:
  gnome gnome-applets gnome-core gnome-panel gnome-panel-data
The following NEW packages will be installed:
  xlibs-data
The following packages will be upgraded
  gnome-control-center libmetacity0 metacity xbase-clients
xfree86-common
  xlibs xlibs-dev
7 upgraded, 1 newly installed, 5 to remove and 27 not upgraded.
Need to get 12.0MB of archives.
After unpacking 5435kB disk space will be freed.
Do you want to continue? [Y/n]

my system asks me if i want remove the gnome packages i've previously
installed from the frederic repository :

ii  gnome          31             The GNOME Desktop Environment
ii  gnome-applets  2.4.0-0        Various applets for GNOME 2 panel
ii  gnome-core     31             The GNOME Desktop Environment --
essential c
ii  gnome-panel    2.4.0-0        Launch and/or dock GNOME 2
applications
ii  gnome-panel-data 2.4.0-0        Common files for GNOME 2 panel




-- 
YuRiX <yurix@firenze.linux.it>