I found the same thing. This occurs on forgot password as well. I refreshed to re-signup and it said email already exists. I went to forgot password and it didn't give me any kind of success/error messaging. I opened my Chrome dev tools and could see the AJAX requests being processed but there was an empty response on forgot password. I didn't receive emails for registration or forgot password, so I'm dead in the water.

Looks like the signups are getting processed now, I just got mine and I signed up an hour ago.

Same here. No feedback at all after clicking Signup. Clicked repeatedly.