Index: modules/forum/forum-icon.tpl.php
===================================================================
RCS file: /cvs/drupal/drupal/modules/forum/forum-icon.tpl.php,v
retrieving revision 1.6
diff -u -p -r1.6 forum-icon.tpl.php
--- modules/forum/forum-icon.tpl.php	9 Oct 2009 00:59:59 -0000	1.6
+++ modules/forum/forum-icon.tpl.php	6 Jul 2010 16:45:35 -0000
@@ -18,7 +18,7 @@
   <a id="new">
 <?php endif; ?>
 
-<?php print theme('image', array('path' => "misc/forum-$icon.png")) ?>
+<?php print theme('image', array('path' => "misc/forum-$icon.png", 'alt' => t('!icon post icon.', array('!icon' => ucfirst($icon))))) ?>
 
 <?php if ($new_posts): ?>
   </a>