А кроме этого
$sql = $type ? "`karma_plus` = '" . ($user['karma_plus'] + $points) . "'" : "`karma_minus` = '" . ($user['karma_minus'] + $points) . "'";
//mysql_query("UPDATE `users` SET $sql WHERE `id` = '" . $user['id'] . "'");
$text_karma = ($type ? "+" : "-") . $points . ' от [url=' . core::$system_set['homeurl'] . '/users/profile.php?user=' . $datauser['id'] . ']' . $datauser['name'] . '[/url]';
mysql_query("INSERT INTO `cms_mail` SET
`user_id` = '0',
`from_id` = '" . $user['id'] . "',
`text` = '$text_karma',
`time` = '" . time() . "',
`sys` = '1',
`them` = '" . ($type ? 'Плюс в карму' : 'Минус в карму') . "'");