Ticket #6481: 6481.diff

wp-admin/includes/upgrade.php

@@ -69 +69 @@
 
         wp_install_defaults($user_id);
 
+        if ( got_mod_rewrite() && is_file(ABSPATH . '.htaccess') && is_writable(ABSPATH . '.htaccess') )
+                $wp_rewrite->set_permalink_structure('/%year%/%monthnum%/%day%/%postname%/');
+        
         $wp_rewrite->flush_rules();
 
         wp_new_blog_notification($blog_title, $guessurl, $user_id, $random_password);