Facebook has provided ‘Send Button’ social widget to be placed on websites. It is a great social plugin that allows users of your website to send message to their Facebook friends. But most of the time, this widget does not work correctly.
Problem occurs when any div with the overflow css property is exists above the widget code anywhere in the page.
As a result, Send button hen clicked won’t show the pop-up box, to send the message, at all or cropped box will appear. To fx this, add following css style anywhere in your page or css file.
.fb-send.fb_iframe_widget span {
overflow: visible!important;
width: 450px!important;}
Hope that helps!