* Having problems with Virtualbox guestadditions in Fedora 12 Guest? The fix can be found in [http://www.virtualbox.org/changeset/27248 r27248]. Add the lines in green as the location specified. Manually apply this fix after you installed the guest additions (but before you rebooted the guest!) by changing /usr/src/vboxvideo-3.1.4/vboxvideo_drm.c and then re-compile the kernel modules by executing this as root user.