This is a known problem, and due to some incompatibility between Kaffe's JVM and Sun's classes.zip. It will definitely be fixed once Tim & Co. release their own version of the class libraries. In the mean-time, you're welcome to find out what's going on (without looking at Sun's sources) and fix it. I suspect the problem is that the main thread's threadgroup is not properly initialized, but don't have the time to track it down right now. - Godmar > > When the following code is run, I consistently get an > ArrayIndexOutOfBoundsException: > > public class Test { > > public static void main(String[] args) { > ThreadGroup group = new ThreadGroup("foobar"); > } > > } > > Eric... > > >