I'm just using the standard iFrame code:
Code:
<iframe src="//www.facebook.com/plugins/like.php?href=http%3A%2F%2Fwww.facebook.com%2Fpages%2FAppGabble%2F291149524274050&send=false&layout=button_count&width=50&show_faces=true&action=like&colorscheme=light&font&height=21&appId=248697491832660" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:50px; height:21px;" allowTransparency="true"></iframe>