This is BETA3 of ACL for Drupal 6.
We do not recommend installing it on a production site, but we encourage you to test it and provide feedback (both good and bad!) in the issues queue. Seefor details.
Changes since BETA2:
- Fix upgrade path from D5 (change acl_id column to auto_increment).
Note: The devel_node_access module, which is part of the Devel module, provides an in-depth view into the inner workings of node access, especially if you enable its debug mode at admin/settings/devel#edit-devel-node-access-debug-mode . This is a big help for understanding the forces that are controlling access to any given node.
Note the Drupal core issues listed on the ACL front page.