Last but not least, a few pointers to further information. A great source for examples is the Bean Validation TCK which can is available for anonymous access in the Hibernate SVN repository. Alternatively you can view the tests using Hibernate's fisheye installation. The JSR 303 specification itself is also a great way to deepen your understanding of Bean Validation resp. Hibernate Validator.

If you have any further questions to Hibernate Validator or want to share some of your use cases have a look at the Hibernate Validator Wiki and the Hibernate Validator Forum.

In case you would like to report a bug use Hibernate's Jira instance. Feedback is always welcome!