can't login to rawhide nightly live images

[Chuck Anderson]

Are the nightly rawhide live images supposed to be login-able?  I
tried XFCE from the 7th and Desktop from the 4th, and cannot login
using root or liveuser on either, so they are unusable (unless someone
can tell me a secret way to break in--systemd.unit=rescue.target and
systemd.unit=emergency.target both require sulogin).

Fedora-20-Nightly-i686-Live-desktop-20130804.15-1.iso
Fedora-20-Nightly-i686-Live-xfce-20130807.10-1.iso
Fedora-20-Nightly-x86_64-Live-xfce-20130807.10-1.iso