Memo component can display more then one cursor on Windows Vista amd64 if cursor positioned by mouse

JCK : JCK6.0 b22
J2SE : FAIL - mustang b81
Platform[s] : FAIL - Windows Vista amd64 beta2
switch/Mode : FAIL - default

Memo component on Windows Vista 64 beta2 doesn't clear old text cursor then I try to position it anywhere by mouse. So I can see two, free or more cursors simultaneously (only one blinking). See attached screenshot.

Many tests affected and even test framework, but this could be seen best on these three tests:
api/java_awt/interactive/CBoardTests.html#CBoardTests[CBoardTest0001]
api/java_awt/interactive/CBoardTests.html#CBoardTests[CBoardTest0002]
api/java_awt/interactive/CBoardTests.html#CBoardTests[CBoardTest0003]


steps to reproduce:

run the following script on Windows Vista 64 beta2:


set HARNESS_JDK=C:/Windows-Vista-amd64/jdk1.6.0
set HARNESS=C:/Windows-Vista-amd64/JCK-runtime-60
set HARNESS_PATH=C:/Windows-Vista-amd64/JCK-runtime-60/lib
set TEST_SUITE=C:/Windows-Vista-amd64/JCK-runtime-60

%HARNESS_JDK%/bin/java -Xconcgc -Xfuture -classpath %HARNESS%\classes -Djava.security.policy=%HARNESS%\lib\\jck.policy javasoft.sqe.tests.api.java.awt.interactive.Clipboard.CBoardTests -TestCaseID ALL