Node not showing date and submitter plus cannot edit

I have one node that doesn't show either submitted date nor submitter plus I'm unable to 'edit' the node via Drupal.

I tried to edit the node in the node_revisions table in phpmyadmin by giving it another timestamp from a working node. But that didn't help. I did turn off caching in performance options to be sure that I saw the current edition of the node.

The node can be seen here:
http://www.denmarkonline.dk/node/1214

The node was most likely made in Drupal 4.x

I have Drupal 5.10 and the node.module is:
// $Id: node.module,v 1.776.2.30 2008/07/16 19:04:21 drumm Exp $

My Drupal system is this:
Database schema Up to date
File system Writable (public download method)
GD library bundled (2.0.34 compatible)
MySQL database 5.0.32
PHP 5.2.6-0.dotdeb.1
PHP register globals Ingen
PHPIDS Found
Unicode library PHP Mbstring Extension
Web server Apache/2.2.3 (Debian)