Consider this simple test where I add a Label inside a Scrollpane which is itself inside an HBox.

In 8u20 b17, the text is shrunk because of a layout problem. This was not the case in Lombard, it's a regression.
Also note that it's the fact that the "fitToWidth" is set to true, and that the ScrollPane is inside an Hbox.

Sample code:

import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ScrollPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class TestScrollpane extends Application {

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

    @Override
    public void start(Stage stage) {

        Label label = new Label("This is a simple label");

        ScrollPane scrollPane = new ScrollPane(label);
        scrollPane.setFitToWidth(true);//This is causing the bug.
        HBox box = new HBox(scrollPane);
        Scene scene = new Scene(box);
        stage.setScene(scene);
        stage.show();
    }
}