Booted machine from livecd image, and the gnome3 worked.
Used Fedup to upgrade an Fedora 18 setup to Fedor 19, and gnome3 doesn't work (Opps screen), but KDE and Xfce does.
Did a clean install from the DVD image of Fedora 19 to a new hard disk, and gnome3 doesn't work, kde regular doesn't work, kde failsafe works, and xfce works.
The machine has a nvidia geforce FX 5200 card, which I know is old, but that is what my classroom has in all 20 machines. So, not just a matter of getting a different card. Long ago was using the nvidia driver from there site, but they dropped support for the older cards, so had to switch to the nouvea driver.
Any suggestions, or just have to stick with xfce..