function bp_dtheme_new_activity_comment() {
	global $activities_template;

	// Bail if not a POST action
	if ( 'POST' !== strtoupper( $_SERVER['REQUEST_METHOD'] ) )
		return;

	// Check the nonce
	check_admin_referer( 'new_activity_comment', '_wpnonce_new_activity_comment' );

	if ( ! is_user_logged_in() )
		exit( '-1' );

	if ( empty( $_POST['content'] ) )
		exit( '-1<div id="message" class="error"><p>' . __( 'Please do not leave the comment area blank.', 'buddypress' ) . '</p></div>' );

	if ( empty( $_POST['form_id'] ) || empty( $_POST['comment_id'] ) || ! is_numeric( $_POST['form_id'] ) || ! is_numeric( $_POST['comment_id'] ) )
		exit( '-1<div id="message" class="error"><p>' . __( 'There was an error posting that reply, please try again.', 'buddypress' ) . '</p></div>' );

	$comment_id = bp_activity_new_comment( array(
		'activity_id' => $_POST['form_id'],
		'content'     => $_POST['content'],
		'parent_id'   => $_POST['comment_id'],
		'error_type'  => 'wp_error'
	) );

	if ( false === $comment_id ) {
		exit( '-1<div id="message" class="error"><p>' . __( 'There was an error posting that reply, please try again.', 'buddypress' ) . '</p></div>' );
	} elseif ( is_wp_error( $comment_id ) ) {
		exit( '-1<div id="message" class="error bp-ajax-message"><p>' . esc_html( $comment_id->get_error_message() ) . '</p></div>' );
	}

	// Load the new activity item into the $activities_template global
	bp_has_activities( 'display_comments=stream&hide_spam=false&show_hidden=true&include=' . $comment_id );

	// Swap the current comment with the activity item we just loaded
	$activities_template->activity                  = new stdClass;
	$activities_template->activity->id              = $activities_template->activities[0]->item_id;
	$activities_template->activity->current_comment = $activities_template->activities[0];

	$template = locate_template( 'activity/comment.php', false, false );

	/**
	 * Backward compatibility. In older versions of BP, the markup was
	 * generated in the PHP instead of a template. This ensures that
	 * older themes (which are not children of bp-default and won't
	 * have the new template) will still work.
	 */
	if ( empty( $template ) )
		$template = buddypress()->plugin_dir . '/bp-themes/bp-default/activity/comment.php';

	load_template( $template, false );

	unset( $activities_template );
	exit;
}