function XoopsUser($id = null)
{
$this->initVar('uid', XOBJ_DTYPE_INT, null, false);

[...]

$this->initVar('user_mailok', XOBJ_DTYPE_INT, 1, false);
// hack
$this->initVar('dohtml', XOBJ_DTYPE_INT, 1, false);

[...]
}

$xoopsTpl->assign('lang_signature', _US_SIGNATURE);
// edit
// $xoopsTpl->assign('user_signature', $myts->makeTareaData4Show($thisUser->getVar('user_sig', 'N'),0,1,1));
$xoopsTpl->assign('user_signature', $myts->makeTareaData4Show($thisUser->getVar('user_sig', 'N'),1,1,1));

if ($thisUser->getVar('user_viewemail') == 1) {