In 5800 device, when there is an input box in a page, and another link or button which will change the option menu. After something are input in the input box, the menu will automatically change to "done" and "cancel". At this moment, if the user doesn't click "done" or "cancel", and directly click that link or button, there will be an error "Application closed:WidgetUI", and the widget exits. Looks like a system level problem.