Take a look at Social Strategy and I think you will see what's happening. I have tried to use it with a menu in the header where I have a widget location. Unfortunately a couple of things are going wrong. One is that it doesn't add the stylesheet and social profile icons for the WordPress custom menu and I only see the standard "URL", "Navigation Label" and "Title Attribute" - no sign of the Link Target or CSS Classes. Also, in the header there are no icons and the links that it puts there only link to the CSS I put into the Title Attribute box. Plus even though I have only put in RSS and Twitter for a test, its occupying half of my header, which makes it a mess. Any idea what's going wrong?