Breadcrumb was added into Magnolia. The original breadcrumb has its own structure and it is reflected in CSS (see stkdefault-styles.css, div id breadcrumb), however we use different structure (several links divided by > character). We want it to look like the breadcrumb on http://community.jboss.org.

You can see the breadcrumb on dev server e.g. here: http://10.16.93.207:8080/author/errai/Userguide/Basics.html