ComboBox/DateField button icons not visible in IE8

On open page, subject input fields located on window displays without button icons (look attachment file).
After click on field or focus other way (e.g. use tab key) icons become visible.
Code for reproduce error.
FieldsUI.java:

@Theme("mytheme")
@Widgetset("ru.tsc.crs.web.MyAppWidgetset")
public class FieldsUI extends UI {

    private class FieldWindow extends Window{
        public FieldWindow() {
            FormLayout layout =new FormLayout();
            setContent(layout);

            layout.addComponent(new ComboBox("Combo"));
            layout.addComponent(new DateField("Date"));
        }
    }

    @Override
    protected void init(VaadinRequest vaadinRequest) {
        UI.getCurrent().addWindow(new FieldWindow());
    }
}

UIServlet.java: @WebServlet(urlPatterns = "/*", name = "test", asyncSupported = true) @VaadinServletConfiguration(ui = FieldsUI.class, productionMode = false) public class UIServlet extends VaadinServlet { } Enviroment:
windows 7 Enterprice SP1
ie: 8.0.7610.17514
jdk1.6.0_45
vaadin 7.3.9 or 7.3.10 Valo theme

18047.png

I did some testing on this, Window is necessary for reproducing the problem but FormLayout is not. Also cannot be reproduced on Windows 7 with IE8 compatibility mode, but with a genuine IE8 (on Windows XP at least) it’s there. I’ll try to remember to make
a ticket
about this tomorrow if no-one else has by then.

Didn’t remember yesterday, but now there’s
#16829
about this.

Anna, thanks.