Index: discuss.php
===================================================================
RCS file: /cvsroot/moodle/moodle/mod/forum/discuss.php,v
retrieving revision 1.112.2.13
diff -u -r1.112.2.13 discuss.php
--- discuss.php	28 Jan 2009 13:11:22 -0000	1.112.2.13
+++ discuss.php	11 May 2009 13:03:04 -0000
@@ -188,6 +188,10 @@
             $section = -1;
             $forummenu = array();
             foreach ($modinfo->instances['forum'] as $forumcm) {
+                $foruminstance = get_record('forum','id',$forumcm->instance );
+                if ($foruminstance->type == 'single') {
+                    continue;
+                }
                 if (!$forumcm->uservisible || !has_capability('mod/forum:startdiscussion',
                     get_context_instance(CONTEXT_MODULE,$forumcm->id))) {
                     continue;