diff --git a/admin/inc/class.uiconfig.inc.php b/admin/inc/class.uiconfig.inc.php
index 6c82411289..bb4202bac1 100644
--- a/admin/inc/class.uiconfig.inc.php
+++ b/admin/inc/class.uiconfig.inc.php
@@ -118,12 +118,12 @@ class uiconfig
 				if ($config)
 				{
 					$c->config_data[$key] = $config;
-					if($GLOBALS['egw_info']['server']['found_validation_hook'] && function_exists($key))
+					if (in_array($key, (array)$GLOBALS['egw_info']['server']['found_validation_hook'], true) && function_exists($key))
 					{
 						call_user_func($key,$config);
 						if($GLOBALS['config_error'])
 						{
-							$errors .= lang($GLOBALS['config_error']) . ' ';
+							$errors .= lang($GLOBALS['config_error']) . "\n";
 							$GLOBALS['config_error'] = False;
 						}
 					}
@@ -134,12 +134,13 @@ class uiconfig
 					unset($c->config_data[$key]);
 				}
 			}
-			if($GLOBALS['egw_info']['server']['found_validation_hook'] && function_exists('final_validation'))
+			if(in_array('final_validation', (array)$GLOBALS['egw_info']['server']['found_validation_hook']) &&
+				function_exists('final_validation'))
 			{
 				final_validation($_POST['newsettings']);
 				if($GLOBALS['config_error'])
 				{
-					$errors .= lang($GLOBALS['config_error']) . ' ';
+					$errors .= lang($GLOBALS['config_error']) . "\n";
 					$GLOBALS['config_error'] = False;
 				}
 				unset($GLOBALS['egw_info']['server']['found_validation_hook']);
diff --git a/admin/inc/hook_config_validate.inc.php b/admin/inc/hook_config_validate.inc.php
index b7d7639ad9..341fb9e387 100644
--- a/admin/inc/hook_config_validate.inc.php
+++ b/admin/inc/hook_config_validate.inc.php
@@ -10,10 +10,9 @@
  */
 
 /*
-  Set a global flag to indicate this file was found by setup/config.php.
-  config.php will unset it after parsing the form values.
+  Set global flag to indicate for which config settings we have equally named validation methods
 */
-$GLOBALS['egw_info']['server']['found_validation_hook'] = True;
+$GLOBALS['egw_info']['server']['found_validation_hook'] = array('vfs_image_dir');
 
 /**
  * Check VFS dir exists and delete image map to recreate it, if vfs-image-dir changes
diff --git a/calendar/inc/class.calendar_hooks.inc.php b/calendar/inc/class.calendar_hooks.inc.php
index 3613b8cb6c..c0d1e11be1 100644
--- a/calendar/inc/class.calendar_hooks.inc.php
+++ b/calendar/inc/class.calendar_hooks.inc.php
@@ -698,7 +698,7 @@ class calendar_hooks
 
 	public static function config_validate()
 	{
-		$GLOBALS['egw_info']['server']['found_validation_hook'] = True;
+		$GLOBALS['egw_info']['server']['found_validation_hook'] = array('calendar_purge_old');
 	}
 
 	/**
diff --git a/setup/config.php b/setup/config.php
index ea28469659..78be151d78 100644
--- a/setup/config.php
+++ b/setup/config.php
@@ -70,7 +70,7 @@ if(@get_var('submit',Array('POST')) && @$newsettings)
 	$GLOBALS['egw_setup']->db->transaction_begin();
 	foreach($newsettings as $setting => $value)
 	{
-		if($GLOBALS['egw_info']['server']['found_validation_hook'] && @function_exists($setting))
+		if(in_array($setting, (array)$GLOBALS['egw_info']['server']['found_validation_hook']) && function_exists($setting))
 		{
 			$setting($newsettings);
 			if($GLOBALS['config_error'])
diff --git a/setup/inc/hook_config_validate.inc.php b/setup/inc/hook_config_validate.inc.php
index 423955a944..45c1f39c8c 100644
--- a/setup/inc/hook_config_validate.inc.php
+++ b/setup/inc/hook_config_validate.inc.php
@@ -11,10 +11,16 @@
  */
 
 /*
-  Set a global flag to indicate this file was found by setup/config.php.
-  config.php will unset it after parsing the form values.
+  Set global flag to indicate for which config settings we have equally named validation methods
 */
-$GLOBALS['egw_info']['server']['found_validation_hook'] = True;
+$GLOBALS['egw_info']['server']['found_validation_hook'] = array(
+	'vfs_storage_mode',
+	'temp_dir',
+	'files_dir',
+	'backup_dir',
+	'mcrypt_algo',
+	'ldap_search_filter'
+);
 
 /**
  * Set vfs_fstab depending from what the user selected for vfs_storage_mode