Hello,
I am using v5.5.3978. So far I managed to make the control appear by adding a javascript line to it:
$(document).ready(function() {
FB.XFBML.parse();
});
Now it would display and seems to connect to Facebook but after login site still looks the same and parts that should appear for logged user are not there.
It would be great if you could provide a clean Facebook Connect web part.