FULL PRODUCT VERSION :
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows 8

A DESCRIPTION OF THE PROBLEM :
I extended the PasswordField control to create a control that is able to toggle the bullets inside the PasswordField on and off. Since the TextField itself is a parent-node I added an Image-object to the PasswordField and tried to bind it to the right inner side of the PasswordField.

REGRESSION. Last worked in version 7u75

ADDITIONAL REGRESSION INFORMATION:
java version "1.7.0_75"
Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. create a new PasswordField-component by extending the PasswordField-class.
2. Add an ImageView-component as child to the PasswordField inside the constructor.
3. bind the xProperty of the ImageView-object to the widthProperty minus the width of the ImageView itself.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The ImageView should be seen on the right inner side of the PasswordField.
ACTUAL -
The ImageView is set fixed in the center of the PasswordField-component.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
no errors

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class TextPasswordFieldSkin extends com.sun.javafx.scene.control.skin.TextFieldSkin {

    public static final char BULLET = '\u2022';
    private TextPasswordField textPasswordField;

    public TextPasswordFieldSkin(TextPasswordField passwordField) {
        super(passwordField, new PasswordFieldBehavior(passwordField));
        this.textPasswordField = passwordField;
    }

    public void updateField() {
        super.getSkinnable().textProperty().setValue(super.getSkinnable().getText());
    }

    @Override
    protected String maskText(String txt) {
        TextField textField = getSkinnable();

        if (textPasswordField != null && textPasswordField.getActivatedValue()) {
            int n = textField.getLength();
            StringBuilder passwordBuilder = new StringBuilder(n);
            for (int i = 0; i < n; i++) {
                passwordBuilder.append(BULLET);
            }
            return passwordBuilder.toString();
        } else {
            return textField.getText();
        }
    }
}


public class TextPasswordField extends PasswordField {

    private TextPasswordFieldSkin skin = new TextPasswordFieldSkin(this);
    private ImageView bulletEyeView;
    private Image bulletEye;

    private String activatedImage = "de/fiverx/testviews/images/eye-symbol-small-pressed.png";
    private String activatedHoveredImage = "de/fiverx/testviews/images/eye-symbol-small-pressed-hovered.png";
    private String deactivatedHoveredImage = "de/fiverx/testviews/images/eye-symbol-small-hover.png";
    private String deactivatedImage = "de/fiverx/testviews/images/eye-symbol-small.png";

    private SimpleBooleanProperty activatedValue = new SimpleBooleanProperty(true);

    public TextPasswordField() {
        super.setSkin(skin);
        bulletEye = new Image(getClass().getResourceAsStream("/" + activatedImage));
        bulletEyeView = new ImageView(bulletEye);
        this.getChildren().add(bulletEyeView);
        bulletEyeView.xProperty().bind(this.widthProperty().subtract(bulletEye.getWidth())); // the evil line that is not working in Java 8 but in Java 7

        bulletEyeView.setPickOnBounds(true);
        bulletEyeView.fitHeightProperty().bind(this.heightProperty());
        bulletEyeView.hoverProperty().addListener(new ChangeListener<Boolean>() {
            public void changed(ObservableValue<? extends Boolean> observableValue, Boolean aBoolean, Boolean t1) {
                if (t1) {
                    if (activatedValue.get()) {
                        bulletEyeView.styleProperty().setValue("-fx-image: url(\"" + activatedHoveredImage + "\");");
                    } else {
                        bulletEyeView.styleProperty().setValue("-fx-image: url(\"" + deactivatedHoveredImage + "\");");
                    }
                } else {
                    if (activatedValue.get()) {
                        bulletEyeView.styleProperty().setValue("-fx-image: url(\"" + activatedImage + "\");");
                    } else {
                        bulletEyeView.styleProperty().setValue("-fx-image: url(\"" + deactivatedImage + "\");");
                    }
                }
            }
        });
        bulletEyeView.pressedProperty().addListener(new ChangeListener<Boolean>() {
            private int counter = 2;
            public void changed(ObservableValue<? extends Boolean> observableValue, Boolean aBoolean, Boolean t1) {
                if (counter % 2 == 0) {
                    if (t1 && counter == 0) {
                        activatedValue.set(true);
                        if (bulletEyeView.hoverProperty().get()) {
                            bulletEyeView.styleProperty().setValue(
                                    "-fx-image: url(\"" + activatedHoveredImage + "\");");
                        } else {
                            bulletEyeView.styleProperty().setValue("-fx-image: url(\"" + activatedImage + "\");");
                        }
                    } else if (t1 && counter == 2) {
                        activatedValue.set(false);
                        if (bulletEyeView.hoverProperty().get()) {
                            bulletEyeView.styleProperty().setValue("-fx-image: url(\"" + deactivatedHoveredImage + "\");");
                        } else {
                            bulletEyeView.styleProperty().setValue("-fx-image: url(\"" + deactivatedImage + "\");");
                        }
                    }
                }
                counter++;
                if (counter > 3) counter = 0;
            }
        });
        activatedValue.addListener(new ChangeListener<Boolean>() {
            public void changed(ObservableValue<? extends Boolean> observableValue, Boolean aBoolean, Boolean t1) {
                skin.updateField();
            }
        });
    }
...
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
no direct workarounds found...