Index: branches/5.1.x/core/install/install_toolkit.php
===================================================================
diff -u -N -r13780 -r13806
--- branches/5.1.x/core/install/install_toolkit.php	(.../install_toolkit.php)	(revision 13780)
+++ branches/5.1.x/core/install/install_toolkit.php	(.../install_toolkit.php)	(revision 13806)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: install_toolkit.php 13780 2010-06-15 20:36:27Z alex $
+* @version	$Id: install_toolkit.php 13806 2010-06-18 18:02:57Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -946,7 +946,7 @@
 
 			if (!$versions) {
 				// not skin changes -> quit
-				return ;
+				return true;
 			}
 
 			$primary_skin =& $this->Application->recallObject('skin.primary', null, Array ('skip_autoload' => true));
Index: branches/5.1.x/core/install.php
===================================================================
diff -u -N -r13780 -r13806
--- branches/5.1.x/core/install.php	(.../install.php)	(revision 13780)
+++ branches/5.1.x/core/install.php	(.../install.php)	(revision 13806)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: install.php 13780 2010-06-15 20:36:27Z alex $
+* @version	$Id: install.php 13806 2010-06-18 18:02:57Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -1366,9 +1366,8 @@
 				return $path;
 			}
 
-			$version = $this->toolkit->ConvertModuleVersion($version);
-
-			if ($version < $this->toolkit->ConvertModuleVersion('5.1.0')) {
+			if (!preg_match('/^modules\//', $path)) {
+				// upgrade from 5.0.x/1.0.x to 5.1.x/1.1.x
 				return 'modules/' . $path;
 			}