Index: trunk/core/kernel/utility/http_query.php
===================================================================
diff -u -N -r3440 -r3441
--- trunk/core/kernel/utility/http_query.php	(.../http_query.php)	(revision 3440)
+++ trunk/core/kernel/utility/http_query.php	(.../http_query.php)	(revision 3441)
@@ -309,7 +309,9 @@
 			$defaults = Array('m_cat_id' => 0, 'm_cat_page' => 1, 'm_opener' => 's');
 			foreach ($defaults as $default_key => $default_value)
 			{
-				$this->Set($default_key, $default_value);
+				if ($this->Get($default_key) == null) {
+					$this->Set($default_key, $default_value);
+				}
 			}
 		}