We haven't heard of that before. Can you let me know a few more details:
* Do you have other social networks setup and, if so, do they also leave the user as deactivated?
* Do you have any profile extensions installed, like CB, JomSocial, EasySocial, etc?
* For the user that is created, is their email address set properly?
Let me know and we can gladly help investigate further.
Thanks,
Alex