The SCLogin module doesn't send any emails. We rely on the Joomla User manager for the registration of users, sending of emails, and even logging them in. The SCLogin module is simply a very configurable 'theme' to be applied to the Joomla User manager. The functionality for the user is not managed by us.
My guess is that the problem is a Joomla 3.2 issue, though I haven't heard of it before. To completely narrow it down that way, I'd recommend simply enabling the standard Joomla mod_login module and using that. If you have the same behavior, that will guarantee it's not an SCLogin specific module.
Finally, I'm going to move this topic to the SCLogin forums after this, as that's the proper place for this post. Please look for it there.
Thanks,
Alex