Index: branches/5.2.x/core/kernel/utility/unit_config_reader.php
===================================================================
diff -u -N -r15707 -r16250
--- branches/5.2.x/core/kernel/utility/unit_config_reader.php	(.../unit_config_reader.php)	(revision 15707)
+++ branches/5.2.x/core/kernel/utility/unit_config_reader.php	(.../unit_config_reader.php)	(revision 16250)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: unit_config_reader.php 15707 2013-03-15 15:54:58Z alex $
+* @version	$Id: unit_config_reader.php 16250 2015-09-20 11:00:07Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -137,6 +137,11 @@
 		}
 
 		$this->Application->cacheManager->applyDelayedUnitProcessing();
+
+		if ( !$this->Application->InitDone && $cache ) {
+			// Allow hooks to modify "m:QueryString" before URL parsing is started during cold start.
+			$this->runAfterConfigRead('m');
+		}
 	}
 
 	function findConfigFiles($folderPath, $level = 0)
@@ -799,9 +804,9 @@
 		$file = $this->prefixFiles[$prefix];
 		$prefix = $this->PreloadConfigFile($file);
 
-		if ($this->FinalStage) {
-			// run prefix OnAfterConfigRead so all
-			// hooks to it can define their clonses
+		if ( $this->FinalStage || $prefix == 'm' ) {
+			// Run prefix OnAfterConfigRead so all hooks to it can define their clones.
+			// Allow hooks to modify "m:QueryString" before URL parsing is started during warm start.
 			$this->runAfterConfigRead($prefix);
 		}
 
@@ -1016,4 +1021,4 @@
 		}
 	}
 
-}
\ No newline at end of file
+}