Index: category_helper.php
===================================================================
--- category_helper.php	(revision 13557)
+++ category_helper.php	(working copy)
@@ -288,7 +288,7 @@
 				return Array ();
 			}
 
-			$cache_key = 'parent_paths[%CIDSerial:' . $main_category_id . '%]';
+			$cache_key = 'parent_paths_named[%CIDSerial:' . $main_category_id . '%]';
 			$cached_path = $this->Application->getCache($cache_key);
 
 			if ($cached_path === false) {