Getting a “Netscape security model is no longer supported” error when using IntelliJ

I’ve been working on a JMS application that uses encryption with JNDI authentication and have encountered the following error message when running it:

Netscape security model is no longer supported. Please migrate to the Java 2 security model instead.

It turns out that this is a problem with the JDK’s plugin.jar file and can be fixed quite [...]

InteliJ IDEA is now open source!

IntelliJ have open sourced IDEA. What does this mean to the Java and Groovy/Grails communities?