When a new user registers they receive an email with a verification as follows:
Nothing happens after clicking it. (Actually, now it works in Firefox, but in Chrome it leaves a blank white screen)
The user is not given the account login details.
After registering you are take to a page which says:
Completed: Thank you for signing up
Your subscription to our site is now set up and you should be able to visit the members only content.
I think part of the problem may be some plugin issues. For example, the BuddyStream plugin was causing my WP-Admin page to be blank. Also, the Facebook plugin seemed to be causing some issues as well.