I have a similar issue. I don't get the error on loading up X but I have the glxgears issue. Not a huge problem in terms of so far it hasn't stopped me from doing anything I needed, but it seems to be a good indicator that things aren't completely installed correctly. I have FBSD 4.9 Release installed and used ports to installed the 4365 drivers. Everything thus far has seemed to install and function properly aside from glxears and a library issue trying to run RTCW: ET.