Re: After Fedora 17 update my login screen (theme) changed!
Do you mean that you upgraded to f17 from another version?
The long on screen may be the old bootup splash screen.
Changing it in grub2 more worrk that grub.
If you just did update to f17, I recall that is what my early rc4 did for several updates.
Maybe you can get it with a new grub2 or kerenl (or both) update?
Do the Math