Index: branches/5.3.x/core/install.php
===================================================================
diff -u -N -r15962 -r15999
--- branches/5.3.x/core/install.php	(.../install.php)	(revision 15962)
+++ branches/5.3.x/core/install.php	(.../install.php)	(revision 15999)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: install.php 15962 2013-09-03 15:13:13Z alex $
+* @version	$Id: install.php 15999 2013-10-25 15:28:31Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -476,7 +476,7 @@
 					$curl_helper = $this->Application->recallObject('CurlHelper');
 					/* @var $curl_helper kCurlHelper */
 
-					$output = $curl_helper->Send($this->Application->BaseURL(WRITEBALE_BASE) . 'install_check.php');
+					$output = $curl_helper->Send($this->Application->BaseURL() . ltrim(WRITEBALE_BASE, '/') . '/install_check.php');
 					unlink(WRITEABLE . '/install_check.php');
 					$execute_check = ($output !== 'OK');