Subdomain Issues

When does this happen, only with Facebook logins or with users logging in through Joomla as well?

Honestly, I'm not sure what would be different about Facebook logins. If you've done the work to make Joomla logins cross domain, then that should work for Facebook as well. JFBConnect doesn't do any checks after the user is logged in, so once the user has logged in through Facebook, they should be treated just like standard Joomla users that login.

Let me know a bit more about what you've done and how you're testing and we'll gladly try to help more.

Thanks,
Alex

Ivan,
Sorry for the delayed response on this and thanks for the PM. Joomla 2.5+ has a setting in the Global Configuration -> Site area called "Cookie Domain". I think you want to use that setting and just put in ".yourdomain.com" there. That will make it so the cookies set on your main site and your subdomain site will be set with the same domain and the subdomain will be ignored.

I *think* that's what you need, but I've honestly never played with that setting. That's definitely where I'd start though and recommend researching that value more as it is likely what you should modify instead of the session handler directly.

I hope that helps,
Alex

Ivan,
Glad to hear that helped.

v5.1.0 of JFBConnect was released on Monday. We'll be sending out a newsletter update and actively promoting it soon. This release has a ton of new features and so far has been going very smoothly with only a few minor bugs that will be fixed with a v5.1.1 release on Friday.

Thanks,
Alex