Index: /sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-showcase/functions.php
===================================================================
--- /sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-showcase/functions.php	(revision 9572)
+++ /sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-showcase/functions.php	(revision 9573)
@@ -302,4 +302,12 @@
 		return;
 	}
+
+	// Return a 404 response for paginated front page requests.
+	if ( $query->is_main_query() && $query->is_page() && $query->is_paged() ) {
+		$query->set_404();
+		$query->query_vars['page_id'] = '';
+		status_header( 404 );
+		nocache_headers();
+	}
 } );