Yokogawa applet fails to repaint in Mustang

Problem:
--------
Yokogawa Electric is one of our licensed members. Their applet-based application fails to repaint using J2SE 6.0 builds.

This is a regression as the problem does not occur in 1.5.0_u5-b02 or
1.5.0_u4-b04 and b05.

The test application provided by Yokogawa is in Sun's Santa Clara QA lab. Please contact <###@###.###> or <###@###.###> if further information needed.

Tested Platform:
---------------
                  win XP (sp2)/ IE6
                  win 2000 pro(sp4) / IE6

Tested Builds:
-------------
                 JRE 1.6.0-b42 (Failed)
                 JRE 1.5.0_04-b04/b05 (OK)
                 JRE 1.5.0_05-b02 (OK)



Steps to reproduce:
------------------

1) Install JRE 1.6.0-b42 onto the test system.
2) Using IE6 browser to invoke the following Yokogawa applet-based application:
   http://10.5.17.194/Stardom/Hmi/Run/SampleEng/SampleIndex.html
3) Click on 'Logon' (Leave the Users ID, password fields blanked)

4) The applet should be loaded
5) Attempt to
     a) Scroll the applet scrollbars (either vertically or horizontally)
   or
     b) bring any windows on top of applet window, and then bring the applet window
        back to the foreground again.

Result:
-------
Applet fails to repaint. Frequently, the whole applet windows turns black
and user can not interact with the applet any more.

It works fine using JRE 1.5.0_04-b04/b05, and JRE 1.5.0_05-b02
Trace file is attached.
     
###@###.### 2005-06-24 00:57:09 GMT
###@###.### 2005-06-24 01:33:05 GMT


Verified the fix in Java SE 6.0-b59 on XP-home(sp2)/IE6
                                       win 2000 pro(sp4)/IE6