timebox BUG ?

<?xml version="1.0" encoding="UTF-8"?>
<?taglib uri="http://www.zkoss.org/dsp/web/core" prefix="c" ?>
<?init class="org.zkoss.zkplus.databind.AnnotateDataBinderInit" arg0="./windowTimeboxBug" ?>

<zk xmlns="http://www.zkoss.org/2005/zul" xmlns:h="http://www.w3.org/1999/xhtml"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.zkoss.org/2005/zul
	http://www.zkoss.org/2005/zul/zul.xsd">

	<window id="windowTimeboxBug" apply="de.forsthaus.webui.test.TimeboxBugCtrl" title="Timebox Bug?" border="none"
		closable="true" mode="modal" width="500px" height="400px">
		<div>
			<hbox>
				<datebox id="dateboxTest" value="@{controller.comment.date}" constraint="no empty" disabled="false"
					width="110px" ></datebox>
				<timebox id="timeboxTest" value="@{controller.comment.date}" constraint="no empty" disabled="false"
					width="110px" ></timebox>
				<button id="btnInit" label="init with current dateTime" ></button>
				<button id="btnShowComponentValue" label="show values" ></button>
			</hbox>
		</div>
	</window>
</zk>

package de.forsthaus.webui.test;

import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.util.GenericForwardComposer;
import org.zkoss.zkplus.databind.AnnotateDataBinder;
import org.zkoss.zul.Datebox;
import org.zkoss.zul.Timebox;
import org.zkoss.zul.Window;

@SuppressWarnings("serial")
public class TimeboxBugCtrl extends GenericForwardComposer<Window> {

	protected Window windowTimeboxBug; // autowired
	protected Datebox dateboxTest; // autowired
	protected Timebox timeboxTest; // autowired

	// Databinding
	protected AnnotateDataBinder binder;
	private Comment comment;

	public TimeboxBugCtrl() {
		System.out.println("ZK " + this.getPage().getDesktop().getWebApp().getVersion() + " / ### TimeboxBugCtrl()");
	}

	@Override
	public void doAfterCompose(Window comp) {
		try {
			super.doAfterCompose((Window) comp);
		} catch (Exception e) {
			e.printStackTrace();
		}
		System.out.println("### doAfterCompose");
		self.setAttribute("controller", this, false);

		/**
		 * Get the data binder.
		 */
		binder = (AnnotateDataBinder) this.getPage().getAttribute("binder", true);

	}

	public void onClick$btnInit(Event event) {
		System.out.println("### onClickBtnInit | values are shown after binder.loadAll()");

		Comment comment = new Comment();
		comment.setDate(new java.util.Date());
		setComment(comment);

		binder.loadAll();

		System.out.println("### datebox ###" + dateboxTest.getValue());
		System.out.println("### timebox ###" + timeboxTest.getValue());
	}

	public void onClick$btnShowComponentValue(Event event) {
		System.out.println("### btnShowComponentValue | values are shown binder.saveAll()");

		binder.saveAll();

		System.out.println("### datebox ###" + dateboxTest.getValue());
		System.out.println("### timebox ###" + timeboxTest.getValue());
	}

	public void onChange$timeboxTest(Event event) {
		System.out.println("### onChange$timeboxTest |  values are shown binder.saveAll()");

		binder.saveAll();

		System.out.println("### datebox ###" + dateboxTest.getValue());
		System.out.println("### timebox ###" + timeboxTest.getValue());
	}

	public void setComment(Comment comment) {
		this.comment = comment;
	}

	public Comment getComment() {
		return comment;
	}

	/**
	 * Internal domain model class.
	 */
	public class Comment {

		private java.util.Date date;

		public Comment() {
		}

		public void setDate(java.util.Date date) {
			this.date = date;
		}

		public java.util.Date getDate() {
			return date;
		}

	}
}

 <datebox id="dateb_Comment_Date" cols="12" format="long+medium"	 value="@{controller.comment.date}" constraint="no empty" disabled="true"  width="230px" ></datebox>