Index: trunk/core/kernel/event_handler.php
===================================================================
diff -u -r4137 -r4141
--- trunk/core/kernel/event_handler.php	(.../event_handler.php)	(revision 4137)
+++ trunk/core/kernel/event_handler.php	(.../event_handler.php)	(revision 4141)
@@ -199,7 +199,7 @@
 				// if template is also item template of category, then remove template
 				$template = getArrayValue($url_params, 't');
 				$item_template = $this->Application->getCache('item_templates', $category_id);
-				if ($template == $item_template) {
+				if ($template == $item_template || strtolower($template) == '__default__') {
 					unset($url_params['t']);
 				}