Edit BuddyPress primary nav so that profile primary item is before the activity primary item

bp-custom.php

<?php

/**
 * BuddyPress 2.6.0 introduced a new nav API
 * with a Backcompat mechanism. But accessing/editing
 * deprecated globals can lead to such problems...
 *
 * It's too bad Theme designers forget to test betas :)
 */
function strothi_profile_primary_nav_first() {
	buddypress()->members->nav->edit_nav( array(
		'position' => 6,
	), 'profile' );
}
add_action( 'bp_xprofile_setup_nav', 'strothi_profile_primary_nav_first' );

// You'll probably need to also have the profile defined as default component..
function strothi_profile_as_front_page() {
	if ( defined( 'BP_DEFAULT_COMPONENT' ) ) {
		return;
	}

	define( 'BP_DEFAULT_COMPONENT', 'profile' );
}
add_action( 'bp_init', 'strothi_profile_as_front_page', 5 );

good catch! Just fixed it!

Another detail, about the first function action filter. bp_xprofile_setup_nav doesn't exist and the function can't work
If you use this in addition with priority, it does:

add_action( 'bp_setup_nav', 'strothi_profile_primary_nav_first',999 );

I'm also curious to know how to move tabs on a group page ? Seems to use a completely different syntax which i'm unable to write correctly. Merci ! ;-)