Also: are you using a custom user navigation menu, or is the fallback menu being displayed? To find out, go to Dashboard -> Appearance -> Menus, and look to see what (if anything) is selected for the appropriate Theme Location in the Theme Locations meta box in the upper left-hand corner.
If the default fallback is being displayed (i.e. no custom menu is selected for the given Theme Location), then add the following to functions.php:
function themename_child_filter_wp_page_menu_args( $args ) {
$args['show_home'] = true;
return $args;
}
add_filter( 'wp_page_menu_args', 'themename_child_filter_wp_page_menu_args' );
That should cause WordPress to output a “Home” link, if the Theme is using the default fallback functionm, wp_page_menu().
