Index: bb-admin/includes/functions.bb-admin.php
===================================================================
--- bb-admin/includes/functions.bb-admin.php	(revision 2425)
+++ bb-admin/includes/functions.bb-admin.php	(working copy)
@@ -909,7 +909,7 @@
 
 	if ( $forum_id ) {
 		$forum_name = get_forum_name( $forum_id );
-		$forum_slug = $forum->forum_slug;
+	    $forum_slug = apply_filters('editable_slug', $forum->forum_slug); 
 		$forum_description = get_forum_description( $forum_id );
 		$forum_position = get_forum_position( $forum_id );
 		$legend = __( 'Edit Forum' );
Index: bb-includes/defaults.bb-filters.php
===================================================================
--- bb-includes/defaults.bb-filters.php	(revision 2425)
+++ bb-includes/defaults.bb-filters.php	(working copy)
@@ -29,6 +29,7 @@
 
 // Slugs
 add_filter( 'pre_term_slug', 'bb_pre_term_slug' );
+add_filter( 'editable_slug', 'urldecode');
 
 // DB truncations
 add_filter( 'pre_topic_title', 'bb_trim_for_db_150', 9999 );