It looks like there may be a problem with the latest dracut building bad
initramfs images. I don't know if this is hardware specific or if it
affects everyone. Falling back to older kernels works around the issue.
People that aren't use the rawhide nodebug repo probably won't have seen
this issue yet since the last rawhide kernel update predates the latest
dracut (dracut-026-1.fc19) update.
I have filed bug 919752 for this issue.
https://bugzilla.redhat.com/show_bug.cgi?id=919752