Yes, you are correct, I looked up and the CSS link generates wrong.
CSS still looks in wp-admin folder, instead of new one I defined.
Source code says
<link rel='stylesheet' href='http://domain.com/wp-admin/load-styles.php?c=1&dir=ltr&load=global,wp-admin&ver=blablabla' type='text/css' media='all' />
Correct would be this
<link rel='stylesheet' href='http://domain.com/MY_NEW_ADMIN_FOLDER/load-styles.php?c=1&dir=ltr&load=global,wp-admin&ver=blablabla' type='text/css' media='all' />
Based on source code I predict something needs correction in following part of admin-header.php. But I may be wrong.
<?php
if ( in_array( $pagenow, array('post.php', 'post-new.php', 'page.php', 'page-new.php') ) ) {
add_action( 'admin_print_footer_scripts', 'wp_tiny_mce', 25 );
wp_enqueue_script('quicktags');
}
do_action('admin_enqueue_scripts', $hook_suffix);
do_action("admin_print_styles-$hook_suffix");
do_action('admin_print_styles');
do_action("admin_print_scripts-$hook_suffix");
do_action('admin_print_scripts');
do_action("admin_head-$hook_suffix");
do_action('admin_head');
if ( get_user_setting('mfold') == 'f' ) {
$admin_body_class .= ' folded';
}
if ( $is_iphone ) { ?>
<style type="text/css">.row-actions{visibility:visible;}</style>
<?php } ?>
Thanks for any new insight!