Attach two images: real control in win7(fresh image for build) and difference between win7 and vista on the same build.

Code for creating:
        tooltip = new Tooltip("Tooltip\nLine 1 line 1\nLine 2 line 2 line 2 line 2\nLine 3 line 3 line 3 line 3 line 3");
        tooltip.setMaxSize(150, 150);
        tooltip.setMinSize(150, 150);
        tooltip.setPrefSize(150, 150);
        
        tooltip.setGraphic(new Rectangle(10, 10));
        tooltip.show(window, window.getX() + 50, window.getY() + 50);