Index: modules/system/system.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.admin.inc,v
retrieving revision 1.252
diff -u -p -r1.252 system.admin.inc
--- modules/system/system.admin.inc	18 Jan 2010 03:06:00 -0000	1.252
+++ modules/system/system.admin.inc	18 Jan 2010 22:18:47 -0000
@@ -1597,7 +1597,7 @@ function system_logging_settings() {
   $form['error_level'] = array(
     '#type' => 'radios',
     '#title' => t('Error messages to display'),
-    '#default_value' => ERROR_REPORTING_DISPLAY_ALL,
+    '#default_value' => ERROR_REPORTING_HIDE,
     '#options' => array(
       ERROR_REPORTING_HIDE => t('None'),
       ERROR_REPORTING_DISPLAY_SOME => t('Errors and warnings'),