The DRUPAL-6--1 nightly snapshot is development code and should not be used in a production environment.
Initial release.
Hotfix release because of a bug in the update functions in beta2.
For people who have already updated their sites from beta1 to beta2, the field setting 'parent' might be lost. Read http://drupal.org/node/298077#comment-973857 for more information.
CSS fix to handle horizontal menus
Initial release for Drupal 6.x