Slider ticks and labels not visible when explicitly set through CSS.
Use the following application to reproduce the issue:

import com.sun.javafx.runtime.VersionInfo;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Slider;
import javafx.scene.control.SliderBuilder;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Main extends Application {

    public static final String style = "-fx-show-tick-labels: true;"
                    + "-fx-show-tick-marks: true;";
    @Override
    public void start(Stage primaryStage) {
        final Slider slider = SliderBuilder.create().min(0).max(100).value(20).focusTraversable(false).build();

        VBox root = new VBox();
        root.setSpacing(10);
        root.getChildren().addAll(slider);
        
        Scene scene = new Scene(root, 300, 250);
        
        primaryStage.setTitle(VersionInfo.getRuntimeVersion());
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

Discovered on Win7, hardware rendering, b101/b102.