--- a/rdf-concepts/index.html	Thu May 17 12:12:11 2012 -0700
+++ b/rdf-concepts/index.html	Fri May 18 12:27:15 2012 +0100
@@ -461,7 +461,7 @@
     described in <a href="http://tools.ietf.org/html/rfc3986#section-2.1">section 2.1</a>
     of [[URI]].</p>
 
-    <div class="note">
+    <div class="note" id="note-iri-interop">
       <p>Interoperability problems can be avoided by minting
       only IRIs that are normalized according to
       <a href="http://tools.ietf.org/html/rfc3987#section-5">Section 5</a>