public function wp_getMediaItem( $args ) {
		$this->escape( $args );

		$username      = $args[1];
		$password      = $args[2];
		$attachment_id = (int) $args[3];

		$user = $this->login( $username, $password );
		if ( ! $user ) {
			return $this->error;
		}

		if ( ! current_user_can( 'upload_files' ) ) {
			return new IXR_Error( 403, __( 'Sorry, you are not allowed to upload files.' ) );
		}

		/** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
		do_action( 'xmlrpc_call', 'wp.getMediaItem' );

		$attachment = get_post( $attachment_id );
		if ( ! $attachment ) {
			return new IXR_Error( 404, __( 'Invalid attachment ID.' ) );
		}

		return $this->_prepare_media_item( $attachment );
	}