Multisite wp-login.php has links to default site

Using WP 3.4 to run a Network: I note that each domain’s wp-login.php contains both links to the domain in question and links to the default site on the Network.

For example wp-login.php it is using the network_site_url() function to create links to the default site – I can’t see why this would be necessary seeing as all login/logout/password reset functionality is in wp-login.php as available on each domain in the Network.

Ideally I would like each site appear to be self contained when it comes to the users (subscribers) that have logins.

Cheers,

Mark