Index: modules/forum/forum.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/forum/forum.module,v
retrieving revision 1.489
diff -u -p -r1.489 forum.module
--- modules/forum/forum.module	17 Mar 2009 12:41:54 -0000	1.489
+++ modules/forum/forum.module	20 Apr 2009 18:41:46 -0000
@@ -504,7 +504,7 @@ function forum_block_view($delta = '') {
         $title = t('Active forum topics');
         $query = db_select('node', 'n');
         $tn_alias = $query->join('taxonomy_term_node', 'tn', 'tn.vid = n.vid');
-        $td_alias = $query->join('taxonomy_term_data', 'td', 'tn.tid = tn.tid');
+        $td_alias = $query->join('taxonomy_term_data', 'td', 'td.tid = tn.tid');
         $l_alias = $query->join('node_comment_statistics', 'l', 'n.nid = l.nid');
         $query->addField('n', 'nid', 'nid');
         $query->addField('n', 'title', 'title');