The attached magnified screen shots show this bug. The borders should be exactly one pixel wide.


import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class RT16140 extends Application {
    public static void main(String[] args) {
        Application.launch(args);
    }

    @Override public void start(Stage stage) {
        Scene scene = new Scene(new Group(), 400, 400);
        Label l = new Label("Background radius");
        l.setTranslateX(50);
        l.setTranslateY(25);
        StackPane sp = new StackPane();
        sp.setStyle(
                "-fx-background-color: red, white;"
                + "-fx-background-insets: 0, 1;"
                + "-fx-background-radius: 5, 4;");
        sp.setPrefSize(100, 100);
        sp.setTranslateX(50);
        sp.setTranslateY(50);

        Label l2 = new Label("Border radius");
        l2.setTranslateX(50);
        l2.setTranslateY(175);
        StackPane sp2 = new StackPane();
        sp2.setStyle(
                "-fx-border-color: red, green;"
                + "-fx-border-radius: 5, 4;");
        sp2.setPrefSize(100, 100);
        sp2.setTranslateX(50);
        sp2.setTranslateY(200);
        ((Group)scene.getRoot()).getChildren().addAll(l, sp, l2, sp2);
        stage.setScene(scene);
        stage.show();
    }
}