Enable rpm fusion stable release (test release will mess up ur system):
rpm -Uvh  http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm   http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm

Now try the kmod-nvidia driver, if its available for ur kernel. If not try the akmod-nvidia. Also install xorg-x11-drv-nvidia-libs.

Type this commands:
su -
sed -i '/root=/s|$| rdblacklist=nouveau|' /boot/grub/grub.conf
mv /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname  -r)-nouveau.img
dracut /boot/initramfs-$(uname -r).img $(uname -r)

Now edit xorg.conf:

gedit /etc/X11/xorg.conf

and add

Section "ServerFlags"
Option "IgnoreABI" "true"

If still failed, then sure, its a bug. Just wait 1 more week to release the final version.

I even enabled rawhide repo, n it fucked up my system twice. 

On Tue, May 18, 2010 at 11:04 PM, Junayeed Ahnaf Nirjhor <zombiegenerator@gmail.com> wrote:
I was trying to install nVidia driver in my Fedora Goddard beta. My
graphics card is nVidia geforce 9800GT and 8400SE. Right now I want to
install 8400 SE driver. I've applied "su -c 'yum -y install akmod-nvidia
xorg-x11-drv-nvidia-libs'" that messed my box and I had to re-install
everything. I'm using KDE. How can I install drivers? The default
drivers doesn't support full 3D.

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