F10Alpha media (and rawhide boot.iso) comes up with the text prompt from isolinux - no graphical menu. The configuration appears to be otherwise valid. Not sure if this is an isolinux bug or misconfiguration by anaconda in creating the images.
Fixed the likely candidate for this in git. Will try to get a build done when I get home (or also mentioned to clumens on IRC to kick one off)
Confirmed fixed.