Index: modules/forum/forum.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/forum/forum.module,v
retrieving revision 1.470
diff -u -p -r1.470 forum.module
--- modules/forum/forum.module	13 Oct 2008 00:33:03 -0000	1.470
+++ modules/forum/forum.module	22 Oct 2008 19:21:01 -0000
@@ -618,7 +618,7 @@ function forum_get_topics($tid, $sortby,
   global $user, $forum_topic_list_header;
 
   $forum_topic_list_header = array(
-    array('data' => ' ', 'field' => NULL),
+    NULL,
     array('data' => t('Topic'), 'field' => 'n.title'),
     array('data' => t('Replies'), 'field' => 'l.comment_count'),
     array('data' => t('Created'), 'field' => 'n.created'),