Index: branches/RC/core/kernel/processors/tag_processor.php
===================================================================
diff -u -N -r11538 -r11744
--- branches/RC/core/kernel/processors/tag_processor.php	(.../tag_processor.php)	(revision 11538)
+++ branches/RC/core/kernel/processors/tag_processor.php	(.../tag_processor.php)	(revision 11744)
@@ -221,7 +221,7 @@
 			$possible_names = explode(',', $params['possible_names']);
 			foreach ($possible_names as $param_name) {
 				$value = $this->Application->Parser->GetParam($param_name);
-				if ((string)$value != '') {
+				if (((string)$value != '') && ((string)$value != '0')) {
 					return $value;
 				}
 			}