FULL PRODUCT VERSION :
build 1.8.0_77-b03

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.10586]

A DESCRIPTION OF THE PROBLEM :
When stage style is set to UNIFIED the content becomes blank

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Set stage style to UNIFIIED:

primaryStage.initStyle(StageStyle.UNIFIED)



EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Should show a windows with text "Hello World" and dark background.
ACTUAL -
Content is blank.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.setTitle("Hello World");
        primaryStage.setWidth(300);
        primaryStage.setHeight(100);
        primaryStage.initStyle(StageStyle.UNIFIED);
        final VBox vBox = new VBox();
        vBox.setAlignment(Pos.CENTER);
        vBox.setStyle("-fx-background-color: DarkGrey");
        vBox.getChildren().add(new Label("Hello World"));
        primaryStage.setScene(new Scene(vBox));
        primaryStage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Not known.