Discuz! 出現「您當前的訪問請求當中含有非法字符「解決方法

\source\class\discuz的discuz_application.php

替換

private function _xss_check() {
                $temp = strtoupper(urldecode(urldecode($_SERVER['REQUEST_URI'])));
                if(strpos($temp, '<') !== false || strpos($temp, '"') !== false || strpos($temp, 'CONTENT-TRANSFER-ENCODING') !== false) {
                        system_error('request_tainting');
                }
                return true;
        }

或使用官方方法解決： http://www.discuz.net/thread-3485502-1-1.html