--- ./block_edit.module.orig	2010-02-22 13:09:43.000000000 +0100
+++ ./block_edit.module	2010-02-26 18:03:03.590184596 +0100
@@ -218,7 +218,7 @@
  */
 function block_edit_preprocess_page(&$vars, $hook) {
   $block_edit_tabs = variable_get('block_edit_tabs', array_keys(node_get_types('names')));
-  if ($block_edit_tabs[$vars['node']->type] === 0 && arg(2) == '') {
+  if (empty($vars['node']) || empty($block_edit_tabs[$vars['node']->type]) && arg(2) == '') {
     $vars['tabs'] = '';
   }
 }