https://bugs.freedesktop.org/show_bug.cgi?id=38783
--- Comment #8 from Sven Arvidsson sa@whiz.se 2011-06-30 05:15:36 PDT --- That's what I thought, it's a problem with the libs shipped with the game.
Try moving/removing libgcc_s.so.1 and libstdc++.so.6 from the ETQW install and it should work.