Trying to install VirtualBox 3.1.6 additions on Fedora 13 i get following messages :
Installing the Window System drivers
Warning: unsupported pre-release version of X.Org Server installed. Not
installing the X.Org drivers.
on this way we cannot start the full scree mode
xorg server is
after upgarding to Virtualbox 3.2.0 the issue is solved .
after installing successfully , reboot and activate the full screen mode
please enjoy :)