I am having a similar issue, except the backend doesn’t say Object ID not found. It worked for about 5 minutes, then just disappeared on me. Here is my code:
add_action( 'init', 'register_my_menus' );
function register_my_menus() {
register_nav_menus(
array(
'top-nav' => 'Top Menu',
'game-nav' => 'Game Menu'
)
);
}
And this is how I am calling the menus:
<?php wp_nav_menu('theme_location=top-nav&container_class=top_nav'); ?>
When I check it out through firebug I can see that the div and ul get rendered, but the menu items are missing. Anyone have any idea what may be causing this? Any help is appreciated.