Yup, you're right. It doesn't work. There was a minor change we made before that release that I uploaded. Please make the following quick change in the /plugins/jlinkedprofiles/communitybuilder/communitybuilder.php file.
At line 256, you'll see:
$fields = $cbTabs->_getTabFieldsDb(null, $cbUser, 'register', null, true);
Change that to:
$fields = $this->getRegistrationFields();
There's another issue we found with the plugin if Error Reporting in Joomla is on in some form to show errors. Basically, some warnings are shown on the registration page. However, that will be fixed in the final release, and shouldn't cause any problems for now.
Again, please test and let me know how it goes. I was travelling today (I'm in a motel room right now) and will be doing more tomorrow. I'll be much more available Saturday afternoon and Sunday. We'll do everything we can to get you going by early next week though.. hopefully, the fix above will be what you need though.
Thanks!
Alex