Index: src/templates/default/bbpress/form-topic.php
===================================================================
--- src/templates/default/bbpress/form-topic.php	(revision 5480)
+++ src/templates/default/bbpress/form-topic.php	(working copy)
@@ -224,7 +224,7 @@
 
 <?php elseif ( bbp_is_forum_closed() ) : ?>
 
-	<div id="no-topic-<?php bbp_topic_id(); ?>" class="bbp-no-topic">
+	<div id="forum-closed-<?php bbp_forum_id(); ?>" class="bbp-forum-closed">
 		<div class="bbp-template-notice">
 			<p><?php printf( __( 'The forum &#8216;%s&#8217; is closed to new topics and replies.', 'bbpress' ), bbp_get_forum_title() ); ?></p>
 		</div>
@@ -232,7 +232,7 @@
 
 <?php else : ?>
 
-	<div id="no-topic-<?php bbp_topic_id(); ?>" class="bbp-no-topic">
+	<div id="no-topic-<?php bbp_forum_id(); ?>" class="bbp-no-topic">
 		<div class="bbp-template-notice">
 			<p><?php is_user_logged_in() ? _e( 'You cannot create new topics.', 'bbpress' ) : _e( 'You must be logged in to create new topics.', 'bbpress' ); ?></p>
 		</div>