ChangedHandler called multiple times during setValue

Dear Isomorphic,

We are using SmartGWT version v8.3p_2013-08-13/Pro Deployment (built 2013-08-13)

When I register a ChangedHandler to a MultiComboboxItem and change the value programatically via setValues multipse event are sent even though the value is changed only once. For example in this case:

public class SmartGwtSandbox implements EntryPoint {

public void onModuleLoad() {

SC.showConsole();
DynamicForm testForm = new DynamicForm();
final MultiComboBoxItem comboBox = new MultiComboBoxItem();
comboBox.setTitle("Choose a number");
comboBox.setTitleOrientation(TitleOrientation.TOP) ;
comboBox.setValueMap("1", "2", "3");
testForm.setFields(comboBox);
RootPanel.get().add(testForm);
HandlerRegistration handler = comboBox.addChangedHandler(new ChangedHandler() {

public void onChanged(ChangedEvent event) {
String result = "";
for (String s : comboBox.getValues()) {
result += s + " ";
}

SC.logWarn("Value changed to:" + result + " event.getValue()" + event.getValue());

}
});
comboBox.setValues(new String[] { "1", "2" });
}
}

The log contains the following 3 entries, it seems that the control is deleted, and then the values are added one by one:

16:16:54.318:WARN:Log:Value changed to: event.getValue()
16:16:54.360:WARN:Log:Value changed to:1 event.getValue()1
16:16:54.399:WARN:Log:Value changed to:2 1 event.getValue()2,1

Although setValues really called only once.

Is it the right behavior? If yes, is there a way to omit ChangedEvents which are not "final" in this sense, and get the event with the "real" final value only?

Thanks in advance!
Attila Tóth