fedora 13 desktop system
When I did a stock install, I ran into a few problems – I couldn't run a gnome-terminal, for example. It turned out that some lines are missing from /etc/fstab in the default install. So I added:
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
And everything worked fine.