http://developers.facebook.com/docs/reference/plugins/like
To include the popular a [Like] button from facebook, I must use the following code :
<iframe src="http://www.facebook.com/plugins/like.php?href=www.MyDomain.com&layout=standard&show_faces=false&width=225&action=like&font=lucida+grande&colorscheme=dark&height=80" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:250px; height:80px;" allowTransparency="true"></iframe>
My website no longer validate on W3C because of the allowTransparency attribute :
Line 313, Column 342: there is no attribute "allowTransparency"
… overflow:hidden; width:250px; height:80px;" allowTransparency="true"></iframe>
Is there a way around? I cannot use the XFBML version. This is pretty bad..
Have you tried omitting this attribute? It should not be required. The standards to not even mention it.