I had the same problem. Here is a workaround that worked for me:
Install mozilla-firefox first, then install xdm. If you have already installed xdm, remove it, reboot, run firefox, install xdm again. Now you should have managed to run firefox and xdm.
Message-ID: <email address hidden>
Date: Sun, 09 Jan 2005 19:32:00 +0000
From: "<email address hidden>" <email address hidden>
To: <email address hidden>
Subject: workaround
I had the same problem. Here is a workaround that worked for me:
Install mozilla-firefox first, then install xdm. If you have already installed xdm, remove it, reboot, run firefox, install xdm again. Now you should have managed to run firefox and xdm.