Index: modules/search/search.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/search/search.module,v
retrieving revision 1.262
diff -u -r1.262 search.module
--- modules/search/search.module	14 Aug 2008 20:13:55 -0000	1.262
+++ modules/search/search.module	26 Aug 2008 15:51:07 -0000
@@ -1152,6 +1152,11 @@
           return theme('search_results', $results, $type);
         }
       }
+
+      if (!isset($results) || !is_array($results)) {
+        $results = array();
+      }
+      return theme('search_page', $results, $type);
     }
   }
 }