Hello, just bought and downloaded the full version for Linux. All the demo versions ran very well for me, however, the full version only got as far as to accept my serial number, then it segfaulted and it does so ever since.
The system is Ubuntu 7.04 on x86 with nVidia 6600GT and 1.0-9631 driver version. The (hopefully)  relevant part of the error log says:
Creating graphic systems
  Creating Renderer2D
  Renderer2D created
  Creating Renderer3D
   Load Renderer3D gpu programs:
    Extrude
 CG ERROR : The file could not be read.
Thanks for any hints as for how to fix this & thanks for bringing the game to Linux once again!