FULL PRODUCT VERSION :
openjdk version "1.8.0_111"
OpenJDK Runtime Environment (build 1.8.0_111-8u111-b14-3-b14)
OpenJDK 64-Bit Server VM (build 25.111-b14, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux 4.8.0-1-amd64 #1 SMP Debian 4.8.7-1 (2016-11-13) x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
ComboBox inside a Popup or PopupControl displays its dropdown in the wrong location, if root of Popup has RTL orientation. 

Illustration available here: http://imgur.com/a/Lolq6  

This looks similar to JDK-8125934 , but it still occurs in 8u111, so it's either a new similar bug, or a regression.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
See attached demo code. 

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Drop down should appear below combobox. 
ACTUAL -
Drop down appears far from the combobox, about (size of Popup) pixels to the left

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package sample;

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.geometry.NodeOrientation;
import javafx.geometry.Point2D;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.PopupControl;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.PopupWindow;
import javafx.stage.Stage;


public class Demo extends Application {
    @Override
    public void start(Stage stage) throws Exception {
        Button b = new Button("Click me");
        b.setOnAction(event -> {
            PopupControl popup = new PopupControl();
            popup.setAnchorLocation(PopupWindow.AnchorLocation.CONTENT_TOP_RIGHT);
            popup.setAutoHide(true);
            ComboBox<String> cb = new ComboBox<>(FXCollections.observableArrayList("foo", "bar"));
            HBox box = new HBox(5, new Label("Select value"), cb);
            box.setNodeOrientation(NodeOrientation.RIGHT_TO_LEFT);
            // This is only to make the popup more visible. Removing it doesn't change the occurrence of the bug.
            box.setStyle("-fx-background-color: derive(-fx-background, 30%); -fx-border-color: black; -fx-border-width: 1px;");
            popup.getScene().setRoot(box);

            Point2D anchor = b.localToScreen(b.getWidth(), b.getHeight());
            popup.show(b, anchor.getX(), anchor.getY());
        });
        ComboBox<String> cb = new ComboBox<>(FXCollections.observableArrayList("foo", "bar"));
        VBox vb = new VBox(10, b, cb);
        vb.setNodeOrientation(NodeOrientation.RIGHT_TO_LEFT);
        Scene scene = new Scene(vb, 200, 200);
        stage.setScene(scene);

        stage.show();
    }


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

}

---------- END SOURCE ----------