ArrayIndexOutOfBoundsException when extension defines overloaded methods

I am using the XMLBeans 2.0 beta. Specifically I am using the Extensions capability that is built in with this version.

If I have a function with more than 2 parameters, for example:

public EventRef createEventRef(String identifier, String href, String temp);

in my interface and handler, the xmlbeans ant task to generate a jar file will throw this error:

java.lang.ArrayIndexOutOfBoundsException: 2

If I take the String temp out:

public EventRef createEventRef(String identifier, String href);

it works perfectly.

Thank You.