requestFocus() does not work well when window is iconized and recovering

requestFocus() does notwrok correctly after window is iconized and recovering.
This issue happens with JDK1.3.0_02 and JDK1.3.1-b22, but does not occur with
JDK1.4-b60.

1. how to repoduce

  1) Compile the attached program
  2) Invoke the command "appletviewer Iconize.html"
    -> You can see the pane which has the button, "DISPLAY WINDOW"
  3) Click the button
    -> You can see another window which has RED square
       and the tittle "Java Applet Window" at the bottom.
  4) Click iconizing button.
    -> the windows wiil be iconized and the icon will show up
       on the task bar.
  5) Click the icon on the task bar
    -> the window will recover.

  At the 5th step, we expect the square becomes RED, but actually BLUE with
  JDK1.3.0_02 and JDK1.3.1-b22.
  (When the "Java Applet Window" gets focus, the square turns RED.
   and losts focus, that turns BLUE.)

  I recommend to execute this program with JDK1.4-b60 in order to know
  the correct behavior.


2. Configration

  MPU : Pentium III 400[MHz]
  Mem.: 256[MHz]
  OS : WindowsNT 4.0 (SP5, Japanese)
  JDK. Ver :
   -JDk1.3.0_02
     java version "1.3.0_02"
     Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0_02)
     Java HotSpot(TM) Client VM (build 1.3.0_02, mixed mode)
      
   -JDK1.3.1-b22
     java version "1.3.1-rc2"
     Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-rc2-b22)
     Java HotSpot(TM) Client VM (build 1.3.1-rc2-b22, mixed mode)