diff -urpN prepatch/modules/node/node.module prepatch-dev/modules/node/node.module
--- prepatch/modules/node/node.module	2007-08-10 12:24:29.000000000 +0800
+++ prepatch-dev/modules/node/node.module	2007-08-10 18:16:26.000000000 +0800
@@ -726,7 +726,7 @@ function node_save(&$node) {
   //Generate the node table query and the
   //the node_revisions table query
   if ($node->is_new) {
-    $node_query = 'INSERT INTO {node} (vid, '. implode(', ', array_keys($node_table_types)) .') VALUES (NULL, '. implode(', ', $node_table_types) .')';
+    $node_query = 'INSERT INTO {node} ('. implode(', ', array_keys($node_table_types)) .') VALUES ('. implode(', ', $node_table_types) .')';
     db_query($node_query, $node_table_values);
     $node->nid = db_last_insert_id('node', 'nid');
     $revisions_query = 'INSERT INTO {node_revisions} ('. implode(', ', array_keys($revisions_table_types)) .') VALUES ('. implode(', ', $revisions_table_types) .')';
diff -urpN prepatch/modules/node/node.schema prepatch-dev/modules/node/node.schema
--- prepatch/modules/node/node.schema	2007-08-10 12:24:29.000000000 +0800
+++ prepatch-dev/modules/node/node.schema	2007-08-10 18:16:52.000000000 +0800
@@ -5,7 +5,7 @@ function node_schema() {
   $schema['node'] = array(
     'fields' => array(
       'nid'       => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE),
-      'vid'       => array('type' => 'int', 'unsigned' => TRUE, 'not null' => FALSE, 'default' => 0),
+      'vid'       => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
       'type'      => array('type' => 'varchar', 'length' => 32, 'not null' => TRUE, 'default' => ''),
       'language'  => array('type' => 'varchar', 'length' => 12, 'not null' => TRUE, 'default' => ''),
       'title'     => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''),
@@ -21,7 +21,6 @@ function node_schema() {
       'translate' => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
     ),
     'indexes' => array(
-      'nid'                 => array('nid'),
       'node_changed'        => array('changed'),
       'node_created'        => array('created'),
       'node_moderate'       => array('moderate'),