diff -urp modules/filter/filter.module modules/filter/filter.module
--- modules/filter/filter.module	2008-11-15 13:45:03.000000000 +0200
+++ modules/filter/filter.module	2008-11-17 14:53:55.000000000 +0200
@@ -483,16 +483,17 @@ function filter_form($value = FILTER_FOR
   $formats = filter_formats();
 
   $extra = theme('filter_tips_more_info');
-
+
+  // Always place filter tips in a collapsible fieldset.
+  $form = array(
+    '#type' => 'fieldset',
+    '#title' => t('Input format'),
+    '#collapsible' => TRUE,
+    '#collapsed' => TRUE,
+    '#weight' => $weight,
+    '#element_validate' => array('filter_form_validate'),
+  );  
   if (count($formats) > 1) {
-    $form = array(
-      '#type' => 'fieldset',
-      '#title' => t('Input format'),
-      '#collapsible' => TRUE,
-      '#collapsed' => TRUE,
-      '#weight' => $weight,
-      '#element_validate' => array('filter_form_validate'),
-    );
     // Multiple formats available: display radio buttons with tips.
     foreach ($formats as $format) {
       // Generate the parents as the autogenerator does, so we will have a