--- modules/node/node.install.1.4	Thu Jan 31 10:04:52 2008
+++ modules/node/node.install	Sat Feb 23 15:05:46 2008
@@ -224,6 +224,7 @@ function node_schema() {
         'description' => t('The log entry explaining the changes in this version.'),
         'type' => 'text',
         'not null' => TRUE,
+        'default' => '',
         'size' => 'big'),
       'timestamp' => array(
         'description' => t('A Unix timestamp indicating when this version was created.'),