--- modules/book/book.admin.inc.orig	2009-09-27 21:44:17.000000000 +0200
+++ modules/book/book.admin.inc	2009-09-27 21:44:25.000000000 +0200
@@ -185,7 +185,7 @@
       'weight' => array(
         '#type' => 'weight',
         '#default_value' => $data['link']['weight'],
-        '#delta' => 15,
+        '#delta' => 50,
       ),
       'plid' => array(
         '#type' => 'textfield',