Index: branches/5.3.x/core/kernel/kbase.php
===================================================================
diff -u -N -r15578 -r15584
--- branches/5.3.x/core/kernel/kbase.php	(.../kbase.php)	(revision 15578)
+++ branches/5.3.x/core/kernel/kbase.php	(.../kbase.php)	(revision 15584)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: kbase.php 15578 2012-10-16 13:55:05Z alex $
+* @version	$Id: kbase.php 15584 2012-10-17 10:50:12Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -441,16 +441,21 @@
 	protected function addCalculatedFields($query, $aggregated = 1)
 	{
 		$fields = $this->getCalculatedFields($aggregated);
-		if ($fields) {
+		if ( $fields ) {
 			$sql = Array ();
+			// inside calculated field "%2$s" is current language
 			$fields = str_replace('%2$s', $this->Application->GetVar('m_lang'), $fields);
 
+			// can't use "%3$s" as usual, because it's already populated in kDBBase::replaceModePrefix() across whole query
+			$fields = str_replace('%4$s', $this->Application->GetDefaultLanguageId(), $fields);
+
 			foreach ($fields as $field_name => $field_expression) {
-				$sql[] = '('.$field_expression.') AS `'.$field_name.'`';
+				$sql[] = '(' . $field_expression . ') AS `' . $field_name . '`';
 			}
-			$sql = implode(',',$sql);
+			$sql = implode(',', $sql);
 
-			return $this->Application->ReplaceLanguageTags( str_replace('%2$s', ','.$sql, $query) );
+			// inside sql "%2$s" is placeholder for calculated fields
+			return $this->Application->ReplaceLanguageTags(str_replace('%2$s', ',' . $sql, $query));
 		}
 
 		return str_replace('%2$s', '', $query);