1.623 has no notable changes

changelog.html

@@ -59,9 +59,7 @@ Upcoming changes</a>
 </ul>
 </div><!--=TRUNK-END=-->
 <h3><a name=v1.623>What's new in 1.623</a> (2015/08/02)</h3>
-<ul class=image>
-  <li class=>
-</ul>
+<p><em>No major user-visible changes in this release.</em></p>
 <h3><a name=v1.622>What's new in 1.622</a> (2015/07/27)</h3>
 <ul class=image>
   <li class=rfe>