Grails 0.4 Released...

The Grails developer team is pleased to announce the release 0.4 of Grails. The release can be obtained from the downloads page.
Notable improvements include:

• ORM enhancements with support for more relationship types, easy transactions and criteria building, constraints to SQL schema mappings, and upgrade to Hibernate 3.2
• All-new non-invasive plugin system for writing reusable plugins for Grails applications
• Greater Spring integration thanks to a new syntax for scripting Spring (http://grails.org/Spring+Bean+Builder) and an upgrade to Spring 2.0
• Easier unit testing of controllers and custom taglibs
• Validation improvements, including support for inherited constraints and simplified size constraint handling
• Automatic encoding of unsafe HTML characters and URL parameters in all scaffolding and taglibs
• Fixes to support Grails on more containers such as GlassFish and over 200 issues and bugs resolved in JIRA
• Grails now ships with Groovy 1.0!