For others who are frustrated by add_submenu_page – using WPMU2.9.1 BP1.13
to BuddyPress menu in WP-admin
function add_menu_link(){
add_submenu_page( 'bp-general-settings', "YOUR MENU", "Your Title ",
'manage_options', 'your-plugin-slug', 'your_function');
}
add_action( 'admin_menu', 'add_menu_link', 20);
// NOTE the addition of a higher priority seems to solve the problems where
// WPMU starts trying to tell you that you don't have access (url is admin.php/?c=1)
I can’t take credit for this – the solution was here
