When I log on as root, the system pops an error saying that the process 'gmc' has crashed due to a segmentation fault. What is 'gmc' and can someone explain in detail what segmentation fault is?

When I log on as another user it doesn't pop out. In both instances I startx.

I'm running RH Linux 6.1 with GNOME.

Thanks!

sincerely,
cow.

PS All I know about segmentation faults are if I'm untidy with my pointers that will happen and buffer overflows are then possible...