diff -u b/modules/help/help.admin.inc b/modules/help/help.admin.inc
--- b/modules/help/help.admin.inc
+++ b/modules/help/help.admin.inc
@@ -47,8 +47,8 @@
     }
   }
   else {
-    $output .= t("This module doesn't provide any help, or may not be installed.");
-  }  
+    drupal_not_found();
+  }
   return $output;
 }
 
only in patch2:
unchanged:
--- a/modules/field/field.api.php
+++ b/modules/field/field.api.php
@@ -199,8 +199,11 @@ function hook_field_info_alter(&$info) {
 /**
  * Define the Field API schema for a field structure.
  *
- * This hook MUST be defined in .install for it to be detected during
- * installation and upgrade.
+ * This is invoked when a field is created, in order to obtain the database
+ * schema from the module that defines the field's type.
+ *
+ * This hook must be defined in the module's .install file for it to be detected
+ * during installation and upgrade.
  *
  * @param $field
  *   A field structure.