Hello, I came across the problem with glut after upgrading from 8.0 to 9. The application I was using (pymol.sf.net) ran fine under 8.0 but after upgrade to 9 it doesn't work any more and the following error message is displayed: ImportError: /usr/lib/libglut.so.3: undefined symbol: XGetExtensionVersion When I downgrade from 9's versions (glut-3.7-12, glut-devel-3.7-12) back to 8.0's (glut-3.7-8, glut-devel-3.7-8) it works again. That's strange because glut hasn't changed for quite a while (version 3.7) and I cannot see why the symbol definitions would change. Any help appreciated... Thanks, -Viktor