Index: trunk/core/kernel/parser/template_parser.php
===================================================================
diff -u -r2678 -r2683
--- trunk/core/kernel/parser/template_parser.php	(.../template_parser.php)	(revision 2678)
+++ trunk/core/kernel/parser/template_parser.php	(.../template_parser.php)	(revision 2683)
@@ -471,7 +471,7 @@
 //					$this->ParamsRecursionIndex--;
 
 				//$this->SetParams($params);
-				if( !isset($pass_params['PrefixSpecial']) ) $pass_params['PrefixSpecial'] = $pass_params['prefix'];
+				if( !isset($pass_params['PrefixSpecial']) && isset($pass_params['prefix']) ) $pass_params['PrefixSpecial'] = $pass_params['prefix'];
 				
 				$ret = $f($pass_params);