Elements that placed inside a SubScene are blurry.

Link to a preview of the sample application on my system:
  http://i.imgur.com/q5pudHP.png

Sample application:

import javafx.application.Application;
import javafx.scene.*;
import javafx.scene.layout.HBox;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class BlurrySubscene extends Application {
    public static void main(String[] args) {
        launch(args);
    }
 
    @Override
    public void start(Stage stage) {
        final Text subsceneText = new Text("Subscene Text:\n\n" + TEXT);
        subsceneText.relocate(0, 0);
        double W = subsceneText.getBoundsInLocal().getWidth();
        double H = subsceneText.getBoundsInLocal().getHeight();

        SubScene subscene = new SubScene(new Group(subsceneText), W, H);
        Scene scene = new Scene(
            new HBox(
                subscene,
                new Text("Scene Text:\n\n" + TEXT)
            )
        );
        stage.setScene(scene);

        stage.show();
    }

    private static final String TEXT =
            "O for a Muse of fire, that would ascend\n" +
            "The brightest heaven of invention,\n" +
            "A kingdom for a stage, princes to act\n" +
            "And monarchs to behold the swelling scene!\n" +
            "Then should the warlike Harry, like himself,\n" +
            "Assume the port of Mars; and at his heels,\n" +
            "Leash'd in like hounds, should famine, sword and fire\n" +
            "Crouch for employment";
}