Index: wp-includes/default-constants.php
===================================================================
--- wp-includes/default-constants.php	(revision 15608)
+++ wp-includes/default-constants.php	(working copy)
@@ -41,9 +41,9 @@
 	if ( !defined('WP_CONTENT_DIR') )
 		define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' ); // no trailing slash, full paths only - WP_CONTENT_URL is defined further down
 
-	// Add define('WP_DEBUG', true); to wp-config.php to enable display of notices during development.
-	if ( !defined('WP_DEBUG') )
-		define( 'WP_DEBUG', false );
+	// Add <code>define( 'WP_DEBUG', true );</code> to wp-config.php to enable display of notices during development.
+	// Add <code>define( 'WP_DEBUG', 'CONFIG' );</code> to wp-config.php to use your servers configure error reporting.
+	defined( 'WP_DEBUG' ) || define( 'WP_DEBUG', false );
 
 	// Add define('WP_DEBUG_DISPLAY', false); to wp-config.php use the globally configured setting for display_errors and not force errors to be displayed.
 	if ( !defined('WP_DEBUG_DISPLAY') )
Index: wp-includes/load.php
===================================================================
--- wp-includes/load.php	(revision 15608)
+++ wp-includes/load.php	(working copy)
@@ -255,6 +255,9 @@
  * @since 3.0.0
  */
 function wp_debug_mode() {
+	if ( 'CONFIG' === WP_DEBUG)
+		return;
+
 	if ( WP_DEBUG ) {
 		if ( defined( 'E_DEPRECATED' ) )
 			error_reporting( E_ALL & ~E_DEPRECATED & ~E_STRICT );