I just tried out the webstart version of jext at http://www.jext.org/ with 6.0:
On second launch the app succeeded. But after launching it takes lots of time (about a 1/2 minute) for the splash screen of the app to come up. No CPU activity meanwhile. What could that be?
Here's the version output:
java version "1.6.0"
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode, sharing)