function register_sidebar( $args = array() ) {
	global $wp_registered_sidebars;

	$i = count( $wp_registered_sidebars ) + 1;

	$id_is_empty = empty( $args['id'] );

	$defaults = array(
		/* translators: %d: Sidebar number. */
		'name'          => sprintf( __( 'Sidebar %d' ), $i ),
		'id'            => "sidebar-$i",
		'description'   => '',
		'class'         => '',
		'before_widget' => '<li id="%1$s" class="widget %2$s">',
		'after_widget'  => "</li>\n",
		'before_title'  => '<h2 class="widgettitle">',
		'after_title'   => "</h2>\n",
	);