So, is this some bug that keeps being ignored in Drupal development, or is it only thoroughly undocumented? Is there really no way to have separate files folders, one for each virtual site?
I set the files folder in the settings.php file thus:-
$conf = array( 'file_directory_path' => 'files/www.example.com' );
so it can't be changed by a site admin
regards --AjK