Index: branches/5.2.x/core/kernel/db/cat_tag_processor.php
===================================================================
diff -u -N -r13840 -r14092
--- branches/5.2.x/core/kernel/db/cat_tag_processor.php	(.../cat_tag_processor.php)	(revision 13840)
+++ branches/5.2.x/core/kernel/db/cat_tag_processor.php	(.../cat_tag_processor.php)	(revision 14092)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: cat_tag_processor.php 13789 2010-06-15 21:00:24Z alex $
+* @version	$Id: cat_tag_processor.php 14092 2010-11-26 22:43:15Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -345,7 +345,7 @@
 			$object =& $this->getObject($params);
 			/* @var $object kDBItem */
 
-			$cache_key = 'product_additional_images[%PIDSerial:' . $object->GetID() . '%]';
+			$cache_key = $object->Prefix . '_additional_images[%' . $this->Application->incrementCacheSerial($object->Prefix, $object->GetID(), false) . '%]';
 			$ret = $this->Application->getCache($cache_key);
 
 			if ($ret === false) {
@@ -433,18 +433,19 @@
 		{
 			$list =& $this->GetList($params);
 			$user_sorting_start = $this->getUserSortIndex();
-
-			$sorting_field = $list->GetOrderField($user_sorting_start);
-			$sorting = strtolower($sorting_field . '|' . $list->GetOrderDirection($user_sorting_start));
-
+	
+			list ($sorting_field, $sorting_direction) = explode('|', $params['sorting']);
+			$sorting_field = preg_replace('/^l[\d]+_(.*)/', '\\1', $sorting_field); // remove language prefix (if any)
 			$field_options = $list->GetFieldOptions($sorting_field);
+	
 			if (array_key_exists('formatter', $field_options) && $field_options['formatter'] == 'kMultiLanguage') {
-				// remove language prefix
-				$sorting = preg_replace('/^l[\d]+_(.*)/', '\\1', $sorting);
-				$params['sorting'] = preg_replace('/^l[\d]+_(.*)/', '\\1', $params['sorting']);
+				// remove language prefix for $sorting_field
+				$params['sorting'] = $list->getMLSortField($sorting_field) . '|' . $sorting_direction;
 			}
-
-			return $sorting == strtolower($params['sorting']) ? $params['selected'] : '';
+	
+			$current_sorting = $list->GetOrderField($user_sorting_start) . '|' . $list->GetOrderDirection($user_sorting_start);
+	
+			return strtolower($current_sorting) == strtolower($params['sorting']) ? $params['selected'] : '';
 		}
 
 		function CombinedSortingDropDownName($params)