Index: pearwiki_filter.module
===================================================================
--- pearwiki_filter.module	(revision 344)
+++ pearwiki_filter.module	(working copy)
@@ -188,7 +188,7 @@
   );
   if (!module_exists('wikitools')) {
     $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_wikitools_'. $format]['#default_value'] = FALSE;
-    $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_wikitools_'. $format]['#attributes'] = array('disabled' => 'disabled');
+    $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_wikitools_'. $format]['#disabled'] = TRUE;
   }
   $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_liquid_'. $format] = array(
     '#type' => 'checkbox',
@@ -198,7 +198,7 @@
   );
   if (!module_exists('liquid')) {
     $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_liquid_'. $format]['#default_value'] = FALSE;
-    $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_liquid_'. $format]['#attributes'] = array('disabled' => 'disabled');
+    $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_liquid_'. $format]['#disabled'] = TRUE;
   }
   $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_freelinking_'. $format] = array(
     '#type' => 'checkbox',
@@ -208,7 +208,7 @@
   );
   if (!module_exists('freelinking')) {
     $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_freelinking_'. $format]['#default_value'] = FALSE;
-    $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_freelinking_'. $format]['#attributes'] = array('disabled' => 'disabled');
+    $form['pearwiki_filter']['wikilinks']['pearwiki_filter_use_freelinking_'. $format]['#disabled'] = TRUE;
   }
   $form['pearwiki_filter']['wikilinks']['pearwiki_filter_interwiki_mapping_'. $format] = array(
     '#type' => 'textarea',
@@ -237,7 +237,7 @@
   );
   if (!module_exists('image')) {
     $form['pearwiki_filter']['images']['pearwiki_filter_use_image_'. $format]['#default_value'] = FALSE;
-    $form['pearwiki_filter']['images']['pearwiki_filter_use_image_'. $format]['#default_value'] = array('disabled' => 'disabled');
+    $form['pearwiki_filter']['images']['pearwiki_filter_use_image_'. $format]['#disabled'] = TRUE;
   }
   return $form;
 }