Not sure why that's happening, but it helps narrow down something to try. Can you turn off the "Show Logging In Popup" (or whatever it's called) setting in the JFBConnect configuration area? The modal.js file is part of Joomla, and what we use to display that white-box, and it seems to be having issues on that page. Knowing if disabling that feature fixes the issue will help figure out the cause (and may get you going right now until fixed).Uncaught TypeError: Cannot read property 'x' of undefined modal.js:274
When you say "tried to log back in", did they click the Login with Facebook button again? If so, then the behavior sounds right.. they are trying to login, and JFBConnect is doing that for them. They may not see the Facebook login popup if they are still logged into Facebook (see the bullet above). You can test if you are still logged into Facebook by simply going to Facebook.com after logging out of your site and seeing if you are still logged in there.User logged out, tried to log back in and was automatically logged into the site with their Facebook account.
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