Pb apt et xlibmesa

[Froment Richard <froment.richard@free.fr>]

Bonjour,

je rencontre des probleme avec apt et visiblement xlibmesa qui sont les 
suivant :

durant un apt-get dist-upgrade, j'obtien ce message:

Reading Package Lists... Done
Building Dependency Tree... Done
You might want to run `apt-get -f install' to correct these.
The following packages have unmet dependencies:
  xlibmesa-gl-dev: Depends: xlibmesa-gl (= 4.3.0.dfsg.1-4) but 4.3.0.dfsg.1-1 
is installed
E: Unmet dependencies. Try using -f.

un apt-get -f install me renvoi:

Reading Package Lists... Done
Building Dependency Tree... Done
Correcting dependencies... Done
The following extra packages will be installed:
  xlibmesa-gl
Suggested packages:
  libglide3
The following packages will be upgraded:
  xlibmesa-gl
1 upgraded, 0 newly installed, 0 to remove and 250 not upgraded.
103 not fully installed or removed.
Need to get 0B/253kB of archives.
After unpacking 4096B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 63261 files and directories currently installed.)
Preparing to replace xlibmesa-gl 4.3.0.dfsg.1-1 
(using .../xlibmesa-gl_4.3.0.dfsg.1-4_i386.deb) ...
Unpacking replacement xlibmesa-gl ...
dpkg: error 
processing /var/cache/apt/archives/xlibmesa-gl_4.3.0.dfsg.1-4_i386.deb 
(--unpack):
 trying to overwrite `/usr/X11R6/lib/libGL.so.1.2', which is also in package 
fglrx
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/xlibmesa-gl_4.3.0.dfsg.1-4_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

Merci de l'aide que vous pourez m'aporté pour resoudre ce probleme !

Froment richard