I'm having an issue when "Display subscription options on user registration form" is selected. After the account is created nothing happens.
Here's a video showing exactly what happens.
This may be due to the fact that I'm using LoginToboggin to automatically login the user on account creation... I just thought of that, so haven't tried it yet. If you don't get back to me before Monday, I'll try disabling that to see if it is the cause of the problem.