Why is a simple Java applet not diplaying properly in its window bounds?

Question

Hello, I am having difficulty displaying applets on the Mac. Here is one of the simplest applets copied exactly from the Sun java website. This applet runs fine on PCs, unfortunately, on my sister's Mac, it does not display properly. It looks like the browser reserves the proper cutout window for the applet. But then the applet does not display in that window, instead, it paints itself shifted away from that window, even covering browser's borders and toolbars.
She is using Leopard, the Mac was bought new last year, and the browser is Firefox. She is using java 1.4, I don't want to switch that, because that is what is by default running there. Most internet users would not know to switch their java version if an applet does not show properly. So it has to show properly for any java version that may be default on a Mac.
Here is the SSCCE:
file HelloWorld.java:
import javax.swing.JApplet;
import java.awt.Graphics;
public class HelloWorld extends JApplet {
public void paint(Graphics g) {
g.drawRect(0, 0,
getSize().width - 1,
getSize().height - 1);
g.drawString("Hello world!", 5, 15);
file HelloWorld.html:
<APPLET CODE=HelloWorld.class WIDTH=850 HEIGHT=730 >
</APPLET>

Answer 1

You'll most likely get a cogent response posting to the Unix forum under OS X Technologies.