Index: branches/5.0.x/core/kernel/utility/unit_config_reader.php
===================================================================
diff -u -r13274 -r13279
--- branches/5.0.x/core/kernel/utility/unit_config_reader.php	(.../unit_config_reader.php)	(revision 13274)
+++ branches/5.0.x/core/kernel/utility/unit_config_reader.php	(.../unit_config_reader.php)	(revision 13279)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: unit_config_reader.php 13274 2010-03-21 09:17:45Z alex $
+* @version	$Id: unit_config_reader.php 13279 2010-03-22 20:08:24Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -825,7 +825,11 @@
 		}
 
 		$this->Application->HandleEvent( new kEvent($prefix . ':OnAfterConfigRead') );
-		array_push($this->AfterConfigProcessed, $prefix);
+
+		if (!(defined('IS_INSTALL') && IS_INSTALL)) {
+			// allow to call OnAfterConfigRead multiple times during install
+			array_push($this->AfterConfigProcessed, $prefix);
+		}
 	}
 
 	/**