anaconda install with anaconda-12.16-1.fc12 fails to write an initrd line to grub.conf. This is because the file is now named initrd-generic-*.img. http://git.fedoraproject.org/git/?p=livecd;a=commit;h=c6b31fa922b322fc5b0b9f48bca3a9ff812f8bdb Here is similar code that was committed to livecd, simply checking for initrd-*.img or initrd-generic-*.img.
*** This bug has been marked as a duplicate of bug 519185 ***