Index: wp-login.php
===================================================================
--- wp-login.php	(revision 18480)
+++ wp-login.php	(working copy)
@@ -86,7 +86,7 @@
 <?php   if ( !is_multisite() ) { ?>
 <div id="login"><h1><a href="<?php echo apply_filters('login_headerurl', 'http://wordpress.org/'); ?>" title="<?php echo apply_filters('login_headertitle', esc_attr__('Powered by WordPress')); ?>"><?php bloginfo('name'); ?></a></h1>
 <?php   } else { ?>
-<div id="login"><h1><a href="<?php echo apply_filters('login_headerurl', network_home_url() ); ?>" title="<?php echo apply_filters('login_headertitle', esc_attr($current_site->site_name) ); ?>"><span class="hide"><?php bloginfo('name'); ?></span></a></h1>
+<div id="login"><h1><a href="<?php echo apply_filters('login_headerurl', bloginfo('url') ); ?>" title="<?php echo apply_filters('login_headertitle', esc_attr($current_site->site_name) ); ?>"><span class="hide"><?php bloginfo('name'); ?></span></a></h1>
 <?php   }
 
 	$message = apply_filters('login_message', $message);