=== modified file 'modules/system/system.admin.inc'
--- modules/system/system.admin.inc	2008-09-20 20:22:23 +0000
+++ modules/system/system.admin.inc	2008-09-27 04:32:23 +0000
@@ -688,7 +692,7 @@ function system_modules($form_state = ar
       '#type' => 'fieldset',
       '#title' => t($package),
       '#collapsible' => TRUE,
-      '#collapsed' => ($package == 'Core - required'),
+      '#access' => ($package != 'Core - required'),
       '#theme' => 'system_modules_fieldset',
       '#header' => array(
         array('data' => t('Enabled'), 'class' => 'checkbox'),