If, like me, you were an early adopter of Fedora 19, you may have upgraded from Fedora 18. If so, you might be seeing a black text screen for the grub 2 boot loader. It’s actually quite easy to get the pretty themed screen back if you want it. Just run this command:
yum install grub2-starfield-theme
This will restore the theme and you’ll see it at the next reboot. There is a bug that addresses this issue, but if you’re an early upgrader, you may have to bring in the fix manually.