Addition to the updated to stop the update in Drupal 5 happening in Drupal 6 too...

page_title.install

@@ -37,6 +37,10 @@ function page_title_schema() {
 function page_title_update_6200() {
   $ret = array();
 
+  if (db_column_exists('page_title', 'id')) {
+    return $ret;
+  }
+
   db_create_table($ret, 'page_title_temp', array(
     'fields' => array(
       'type'       => array('type' => 'varchar', 'length' => 15,  'not null' => TRUE, 'default' => 'node'),