--- a/spec/latest/index.html	Thu Aug 18 15:50:48 2011 -0400
+++ b/spec/latest/index.html	Thu Aug 18 15:57:29 2011 -0400
@@ -3657,7 +3657,7 @@
 
 </section>
 
-<section>
+<section class="appendix">
 <h1>Experimental Concepts</h1>
 
 <p class="issue">There are a few advanced concepts where it is not clear 
@@ -4051,6 +4051,7 @@
 -->
 </pre>
 </section>
+</section>
 
 <section class="appendix">
 <h3>Mashing Up Vocabularies</h3>
@@ -4119,7 +4120,6 @@
 
 </section>
 
-
 <section class="appendix">
 <h1>IANA Considerations</h1>