Question

Fiddle: http://jsfiddle.net/GEzaD/

Why doesn’t the loader disappear? And why can’t I see the entire comment box? Did I miss something obvious here?

Answer 1

You have to init the Facebook widget:

FB.init({
           cookie:true, 
           status:true, 
           xfbml:true, 
           oauth:true
        });

Add this FB.init() call just before FB.XFBML.parse();

If you want to link the plugin to an app you can add an appId argument.