Fix Fresh install of WP 3.5.1 and S2Member

Hi,

I want to buy the S2member pro and trying out the S2member first but immediately i encounter a critical problem when setting up.

The settings:
1. Fresh install of wordpress 3.5.1
2. Fresh install of S2member Framework

When i try to add in a field (such as contact_number) in General options->Custom Registration/Profile Fields->Add Field:
1. After adding the information, when i click Create Registration Field button, nothing happens.
2. When I click on the Create Registration field button a second time, it says “that field ID already exists”.
3. Tried a few times to add other field such as country, I also get the same error.

I’ve not installed any other plugin; just default twentytwelve theme from WP 3.5.1 and S2member framework.

Is this a big bug? Please help. I am ready to buy the PRO version, but pretty disappointed with the free version now.

Will there be a stable release soon to fix this?