When I tried to use the GitHub (already logged in there via Win 8.1 & Chrome latest) button to register it failed. Had to go the manual route and first email did not deliver in a timely fashion or at all. After trying Login (without confirmation email was rejected) the email confirmation resubmitter did deliver. It was marked as [SPAM] but not delivered into a spam folder. Unless the first one came a late second and the second got lost but I'm guessing after waiting some time (in both cases) to confirm, it was in fact the first one that failed.
I would have rather have used GitHub.