5 out of 6 ain't bad though, right?
Thanks for pointing that out. We just stared at our code a bit and think we may have found the cause. Can you please go to the JFBConnect -> Configuration -> Facebook area and set the "Show login credentials in popup" setting to "No" and test again? That will redirect the user to Facebook instead of trying to use a popup window for authentication and looks like it may fix the problem.
Test, and let us know how that goes. If it works, we'll investigate if there's an easy way to re-enable that setting (if you want) and make the connect account feature work as well.
Thanks,
Alex