Slune crashes on start

I have a AMD X2 4200+ with an ATI X300 using ATI non-free drivers

$ slune
* Slune * Slune lives in /usr/share/games
* Slune * PySDL_mixer not installed, trying PyOpenAL...
* Soya * Using 8 bits stencil buffer

* Soya * version 0.10.1
* Using OpenGL 2.0.5582 (8.21.7)
* - renderer : RADEON X300/X550 Series Generic
* - vendor : ATI Technologies Inc.
* - maximum number of lights : 8
* - maximum number of clip planes : 6
* - maximum number of texture units : 8
* - maximum texture size : 2048 pixels

* Slune * Using sound system OpenAL
/usr/lib/python2.4/site-packages/soya/particle.py:20: DeprecationWarning: The content of this module is now in the soya module.
  warnings.warn("The content of this module is now in the soya module.", DeprecationWarning)
* Slune * (Psyco not found ; if you are using an x86 processor, installing psyco can speed up Slune a little)
Segmentation fault