JComponent does not notify listener on move ancestor

Testsuite: JCK 6.0 b006
Test: api/javax_swing/JComponent/index.html#addAncestor2[JComponent2065]
Failed: mustang b51, b52 - SunOS stt-05 5.8 Generic_117351-24 i86pc i386 i86pc
            mustang b51, b52 - SunOS stt-26 5.9 Generic_117172-07 i86pc i386 i86pc
Passed: mustang b50 - SunOS stt-05 5.8 Generic_117351-24 i86pc i386 i86pc,
                          SunOS stt-26 5.9 Generic_117172-07 i86pc i386 i86pc
            mustang b50, b51, b52 - Windows XP SP2
How to reproduce:
  a) With JCK :
TESTSUITE=/net/jsqalab/export/testsuites/JCK/jck6.0/b06/JCK-runtime-60
DISPLAY=":0"
export DISPLAY

PRODUCT="/java/re/jdk/6.0/promoted/ea/b51/binaries/solaris-i586/bin/java"
$PRODUCT -Xshare:off -Xfuture -classpath $TESTSUITE/classes -Djava.security.policy=$TESTSUITE/lib/jck.policy javasoft.sqe.tests.api.javax.swing.JComponent.addAncestor2Tests -TestCaseID ALL
 b) With standalone test:
        use addAncestor2Tests.java from attach ( No JCK is needed )

Note: this failure is NOT 100% reproducable ( possible timing issues )
      so run it several times if you can't reproduce it on a first try.

Description: JComponent does not notify listener on move ancestor

Test output :
----------out1:(2/147)----------
JComponent2065: Failed. Does not notify listener on move ancestor
STATUS:Failed.test cases: 1; all failed; first test case failure: JComponent2065
----------out2:(1/88)----------
====== JComponent2065 ====== public void addAncestorListener(AncestorListener listener)
result: Failed. test cases: 1; all failed; first test case failure: JComponent2065


test result: Failed. test cases: 1; all failed; first test case failure: JComponent2065

Suggestions:
May be is's the same issue as in test
  api/java_awt/Event/FrmEventTests.html#FrmEventTest0008[FrmEventTest0008] failure,
  see bug 6323293.
have seen the same failure on jdk6.0 b51 + jck6.0 b08 in plugin test mode on Linux AS 3.1