A new version of Liquid had been released and will be available as soon as the Drupal site updates (in less than 5 minutes).
Changes
There are many changes from the first hack. Some of the more important ones are listed here.
Modularization
The main problem with the old module was that any extension had to be made by patching. Therefore, the most important change has been to define a hook point interface and split out all but the base functionality into separate modules. Today liquid consists of four modules:
* Liquid Base - The base system which provides the infrastructure for wiki name-binding and access permissions.
* Liquid Access - Provides five more permission controls and three access levels that can be defined for each node in the wiki.
* Liquid MoveRef - Provides redirects and references to moved wiki pages (similar to those in media wiki)
* Liquid Filter - Provides the Media Wiki Markup Language filter.
The extension interface provided by Liquid Base consists of three parts
* Wiki API - Allows modules to respond to wiki events (insert, move, remove, update, validate).
* Page Handles - Allows modules to provide page handles for specific wiki id's. This makes it possible for other modules to provide special pages and similar functionality