KDE, Xfce and LXDE are pretty close to RC2, I think. GNOME 3.4 is in, so
Desktop has changed. We did test with an unofficial 'pre-RC3' live image
with GNOME 3.4 built in and found it passed all validation tests, so
that's good, but we should re-do them with the official build just to
make sure. Thanks!