Ticket #13638: 13638.2.patch

wp-activate.php

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

wp-signup.php

@@ -33 +33 @@
 }
 
 // Fix for page title
-$wp_query->is_404 = false;
+$wp_query->is_home = true;
 
 function wpmu_signup_stylesheet() {
         ?>