IE showing scrollbars when layout is 100%

When the login subwindow is displayed in IE, a scrollbar is shown, although there’s nothing to scroll. I know it has something to do with the width being 100%. I’m guessing that this is some IE quirk, but just wanted to see how I might do it differently. Just trying to figure out how to get a consistent look across browsers. If not, it’s no big deal.


public class LoginWindow extends AbstractWindow implements ClickListener {
  
  private TextField username;
  
  private TextField password;
    
  public void postConstruct() {
    username = new TextField("Username");
    
    password = new TextField("Password");
    password.setSecret(true);
        
    VerticalLayout layout = new VerticalLayout();
    layout.setSizeUndefined();
    layout.setSpacing(true);
    layout.addComponent(username);
    layout.addComponent(password);
    layout.addComponent(new Button("Login", this));
    
    Window window = new Window(
      "Please Login",
      new VerticalLayout() {
        {
          setMargin(true, false, false, false);
        }

        public void addComponent(Component c) {
          super.addComponent(c);
          setComponentAlignment(c, Alignment.TOP_CENTER);
        }
      }
    );
    window.setWidth("225px");
    window.setHeight("200px");
    window.setDraggable(false);
    window.setModal(true);
    window.setClosable(false);
    window.setResizable(false);
    window.addComponent(layout);

    addWindow(window);
  }

  @Override
  public void buttonClick(ClickEvent event) {
    try {
      fireEvent(
        new AuthenticatedEvent(
          this,
          getService().authenticate(
            username.getValue().toString(),
            password.getValue().toString()
          )
        )
      );
    } catch (AuthenticationException e) {
      showNotification("Login Failed",Notification.TYPE_ERROR_MESSAGE);
    } finally {
      username.setValue("");
      password.setValue("");
    }
  }
  
}