Java Version: 1.6.0-beta2-b83 and early builds.
Platform: WindowsXPpro ladybird.sfbay

Problems:

When run the regression test using recent mustang build b83, it threw exceptions,
but it runs ok in solaris 10.

The log as followings:
java.lang.RuntimeException: Dialog is not on top after calling to toBack() metho
d
        at DialogSentToBackTest.fail(DialogSentToBackTest.java:160)
        at DialogSentToBackTest.init(DialogSentToBackTest.java:47)
        at DialogSentToBackTest.main(DialogSentToBackTest.java:91)
Exception in thread "main" java.lang.RuntimeException: Dialog is not on top afte
r calling to toBack() method
        at DialogSentToBackTest.fail(DialogSentToBackTest.java:160)
        at DialogSentToBackTest.init(DialogSentToBackTest.java:55)
        at DialogSentToBackTest.main(DialogSentToBackTest.java:91)

To reproduce the problem:
1. compile and run the attached test on winXPpro
or get test from:
/java/re/jdk/1.6.0/promoted/all/b83/ws/j2se/test/java/awt/Modal/DialogSentToBackTest/DialogSentToBackTest.java