When change menu's label, frame can not be resized.

JDK Version: JDK-1.2beta3-F
Locale: All
Platform: Solaris

When change the content of a menu's label, frame can not be resized, while in version 1.1.3, it works well.
Following is a test source:
======================t7.java====================================
import java.awt.*;


public class t7 {
public static void main(String args[]) {
Frame f = new Frame("My Window");

MenuBar mb = new MenuBar();
Menu mn = new Menu("menu");
MenuItem mi = new MenuItem("item");
mn.add(mi);
mb.add(mn);
TextArea ta = new TextArea(10, 10);
ta.setText("12345678");
f.add(ta);
f.setMenuBar(mb);

int i = 0;
String s = "";

f.pack();
f.show();

while(true) {
s = s + i;
if (i == 9) {
s = "";
i = 0;
}
i++;
try {
mn.setLabel(s);
Thread.sleep(600);
} catch (Exception ex) {}
}
}
}
====================================================================
This program change the menu's label every a short time, but you can not
resize the size of the frame using mose.

jim.hu@prc 1998-02-10