[Xenon]

in member.php found this lines:

PHP Code:

// ############################### start login ###############################
if ($action=="login") {
  $templatesused = 'redirect_login,error_wrongpassword,error_wrongusername';
  include("./global.php");
  $userid = 0;
  if (isset($username)) { 


just below add:
$username = eregi_replace("( ){2,}", "", $username);

should work