I am kind of curious about something. From everything I have heard from different PC technicians and game forums, I think the problem isn't so much with Planeshift and Crystal Space as it is with the new Nvidia drivers being all screwy.
My system worked fine with version 0.3.017 of PS until I updated my Nvidia drivers to the newest version. Now bdroad looks like I am standing on the surface of the sun unless I switch to free rotate and zoom way out, until I turned on vertex buffer I was getting the summon missile crash, and certain graphical glitches make the sky look like I just ate three or four desert buttons. Oh yes and let's not forget all of the wonderful crashes related to particles with the Nvidia drivers that Aryhann has been working on.
Unfortunately I don't think Nvidia is going to change their drivers for us, so I guess we will have to adapt for them. I wish the Crystal Space team the best of luck in resolving these issues!