Bug fixed ZK-2250: Firefox Grid Drag'n'Drop issues
http://tracker.zkoss.org/browse/ZK-2250
Bug ZK-2086: BandBox popup invalid render if ON_OPEN event listener is attached
Bug fixed ZK-2248: Window Hflex="min" client side error with <script> tag
http://tracker.zkoss.org/browse/ZK-2248