Hmm, strange error appeared for me too:
uldics@kaste:~$ planeshift
Inconsistency detected by ld.so: dl-close.c: 731: _dl_close: Assertion `map->l_init_called' failed!
uldics@kaste:~$
This happens in first instant when game is tried to be started. Nothing appears on screen. System is Debian Squeeze (testing), on AMD processor 2.9GHz, built in AMD HD3200 graphics with proprietery accelerated drivers (2 days old latest dirver Catalyst 9.12 Release: x86 and x86_64, driver version 8.681 though catalyst says something about 2D driver version 8.68.2), RandR version 1.2, OpenGl version 3.2.9232. Yesterday I played the game, there was one update to the game. After that, it was able to start and I played it. No kernel, graphics drivers or anything with DRM or Xorg was changed on my PC since then. Compiz Fusion is working as before (just that you know, 3D is actually working).
I post it here, cause same error was in this tread. I hope this helps resolving the problem and I hope someone can help me too with this. If necessary, I can make new thread with this problem.