Currently iso images for the X86 are failing due to the bug in https://bugzilla.redhat.com/show_bug.cgi?id=1497458
At this moment there will be no beta for x86 because of this. Sorry I didn't catch that this was a problem until reading my email today.
One of the things that a SIG needs to do is look at the nightly composes to check that spins are being made so they can be ahead of the game.