CSS errors printed if a ComboBox's items are removed after a Stage is hidden

If you remove the items from a combobox after it's stage has been hidden it will print errors to the console like this:

Dec 10, 2013 10:50:16 AM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-text-base-color' while resolving lookups for '-fx-text-fill' from rule '*.combo-box>*.list-cell' in stylesheet jar:file:/usr/local/jdk1.8.0/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss

If you remove the combo from the scene before clearing its items then the errors don't appear.

Run the provided test class and use the button to open a new stage with a combobox. Then close the new stage and observe the errors printed to the console.

************************************* Test Class **************************************
import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;

public class ComboBoxTest extends Application {

   public void start(final Stage primaryStage) throws Exception {

      primaryStage.centerOnScreen();
      primaryStage.setHeight(350);
      primaryStage.setWidth(500);

      Button showButton = new Button("New Stage...");
      showButton.setOnAction(new EventHandler<ActionEvent>() {
         public void handle(ActionEvent event) {
            Stage newStage = createNewView();
            newStage.show();
         }
      });

      primaryStage.setScene(new Scene(new StackPane(showButton)));
      primaryStage.show();

   }

   private Stage createNewView() {
      final Stage stage = new Stage();

      final ComboBox<String> combo = new ComboBox<>();
      combo.getItems().addAll("One", "Two", "Three");
      combo.setValue(combo.getItems().get(0));
      final StackPane pane = new StackPane(combo);
      stage.setScene(new Scene(pane, 300, 150));
      
      stage.setOnCloseRequest(new EventHandler<WindowEvent>() {
         public void handle(WindowEvent event) {
            event.consume();
            Platform.runLater(new Runnable() {
               public void run() {
                  stage.hide();
                  // uncomment this line and the errors go away.
                  // pane.getChildren().clear();
                  combo.getItems().clear();
               }
            });
         }
      });

      return stage;
   }

   public static void main(String[] args) throws Exception {
      launch(args);
   }

}