Drupal 5.6 and register_globals
As of Drupal 5.6 you will no longer be able to install the CMS onto a server with register_globals enabled. The notice on the Drupal website says: We no longer support servers with the PHP directive register_globals set to on. Attempts to install Drupal 5.6 when register_globals is enabled will fail. Current installations will continue to function, but will display an error on administration pages and the status report. ...