Message4326

I've noticed that some of my scripts are broken when using Jython
2.5beta4. It worked fine for Jython 2.2.2. I cannot now deserialize 
a list with Java objects inside. The example script is in attachment.
It gives an error on line 19:

Traceback (most recent call last): ,   File p0d_io_java.py, line 20, in
<module> ,     list =fin.readObject(); , AttributeError: javapackage
object has no attribute java.util.Date , 

If this a feature of v2.5 rather than a bug, I would be intrested to
know how can I serialize/deserialize  a list of Java objects.