Ticket #13638: 13638.patch

wp-activate.php

@@ -23 +23 @@
 }
 add_action( 'wp_head', 'do_activate_header' );
 
+// Fix for page title
+$wp_query->is_404 = false;
+
 function wpmu_activate_stylesheet() {
         ?>
         <style type="text/css">