@cubmanky:

in includes/classes/navigation_history.php, lines 32-34 change as follows:

PHP Code:
//from
  function add_current_page() {
    global $request_type, $cPath;
    $get_vars = "";
//to
  function add_current_page() {
    global $request_type, $cPath;
    $get_vars = array(); 
lets us know if that fixes it!

best.