Hi guys, This is the last time I'm gonna bring this up. I finally managed to fix the problem. Though I don't know why it worked. I did an "rpm -e --nodeps XFree86-Mesa-libGL" and a "rpm -e --nodeps XFree86-Mesa-libGLU" then a "yum install" of the above packages. Now things are working. Something must have been broke in these packages but the "rpm -V" switch wouldn't tell me anything. Oh well. I'll just put it down to "voodoo" Cheers for the suggestions anyway Adam