Problem running Java applications on Lubuntu 12.10

[Aere Greenway]

All:

I just noticed something running Java applications on Lubuntu 12.10, and
it probably didn't do it before the latest updates I installed today
(which included updates to the Java JRE/JDK's.  

When I run a Java application, there is no indication of it (or any of
its sub-windows) in the taskbar!  

The application is obviously there, and works, but it doesn't appear in
the taskbar.  

When the Java application shows a modal dialog box, that dialog box gets
window focus, but when you finish with it (the dialog is closed), the
main application does not get re-focused.  

I can't get to it via Alt-Tab.  The only application in the taskbar is
Evolution mail.  

The only way I can get back to my Java application main window, is to
actually click on the Java application's window, and I have to do that
every single time it uses a sub-window, which is a real pain!  

-- 

Sincerely,
Aere