So the intel driver has a bug right now where the screen only updates if you move the mouse or press a key.
It's mentioned off hand in
https://bugzilla.redhat.com/show_bug.cgi?id=460330#c4
I've been downgrading to
xorg-x11-drv-i810-2.4.2-1.fc10.x86_64.rpm
to work around the issue on my own laptop. I don't know if there's a newer version that also works.
We probably shouldn't let the beta go out with the broken package should we?
--Ray