I tried attaching gdb as well and here's a backtrace:
Program received signal SIGSEGV, Segmentation fault.
0xf7248c64 in M4::RenderObject::GetType (this=0x0) at ../Source/Render/RenderObject.cpp:33
33 ../Source/Rende…
Thanks coryd, that was it and medium texture will work for now. I'll have to try out either the 310 drivers and/or 13.04 another day when I've got more time.