I have kanotix installed and I tried to post this in kanotix forum, However, I couldn't post it there (a 404 php error )

After I did apt-get update and apt-get dist-upgrade I got this error:

Code:
Preparing to replace xlibmesa-gl 6.8.2.dfsg.1-1 (using .../xlibmesa-gl_6.8.2.dfsg.1-2_i386.deb) ...
Unpacking replacement xlibmesa-gl ...
dpkg: error processing /var/cache/apt/archives/xlibmesa-gl_6.8.2.dfsg.1-2_i386.deb (--unpack):
 trying to overwrite `/usr/X11R6/lib/libGL.so.1.2', which is also in package fglrx-6-8-0
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/xlibmesa-gl_6.8.2.dfsg.1-2_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
I've already use install-radeon-debian.sh

Thanks, lat.