Handle Count increases when IE windows is opened and closed repeatedlt in 5.0u7-b02

Handle count of IE explore(iexplore) becomes 10 times after 6 hours.
This seems too much.

CONFIGURATION:
 OS : WinXP(SP2, Japanese and english)
 JRE : jre5.0u7
      java version "1.5.0_07"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-b02)
      Java HotSpot(TM) Client VM (build 1.5.0_07-b02, mixed mode, sharing)
 CPU : PentiumIII 700[MHz]
 Mem: 256 MB

REPRODUCE:
 1) Unfold the attached zip file(ArcTest)
 2) modify ArcTest\testcase\top.html adjusting to your directory structure.
 3) double click the Top.html
  IE windows appears
 4) Select "1.5.0_xx ArcTest" in pull down menu
 5) Set "5000" in t"Interval" textbox
 6) click "Launch" button
  "ArcTest" is opened and closed automatically

HOW to measure handle count :
 1) Open [control panel]-[administrative tools]-[performance]
 2) Click "+" of Performance Logs and alerts
 3) point "Counter Logs" and click right button.
    select "New Log Setting..." and input log file name
 4) Click "Add Counter" button
 5) Select "iexplore" in "Select instance from list" box
 6) Select "Handle COunt" in "Select counters from list" box
 7) click "add" button.
 6) Click "Log files" tag
 7) select "Tag FIle[delimited]" from "Log file name" pull down menu.
 8) click "OK" button

RESULT:
 The followings are result after about 8 hours run in WinXP(english)

time(Hour) Num. of handles
-----------+----------------------------------------
   0 755
   1 2042
   2 3402
   3 4346
   4 5517
   5 7819
   6 8963
The following is the result in 5.0u5, (windowsXP, SP2, english)

time(Hour) Num. of handles
-----------+----------------------------------------
   0 694
   1 860
   2 873
   3 886
   4 897
   5 883
   6 906
The followings are the result in 5.0u6, WindowsXP(SP2, english).

time(Hour) Num. of handles
-----------+--------------------------
   0 740
   1 2001
   2 3160
   3 4323
   4 5460
   5 6625
   6 7559

According to the results in 5.0u5, u6 and u7,
this handle leak has come to occur since 5.0u6.