> I have a problem where the below code chunk causes handle leaks on some
> machines. The leak APPEARS to be handles to the registry key:
>
> HKCU\Software\Microsoft\Windows\CurrentVersion\Int ernet
> Settings\ZoneMap
>

Hi,
I'm just fighting exactly the same problem, but I don't think that this
is only related to XMLHTTP. I have latest WindowsXP (SP2+windowsupdate,
IE version 6.0.2900.2180.xpsp_sp2_gdr.050301-1519). My IE seems to open
new handles each time I :

.. set src on SCRIPT element (2 handles)
.. set src on IFRAME element (2 handles)
.. set src on IMG elment (2 handles)
.. set innerHTML propery to some text (=no new elements) on DIV (or any
other visual element) (2 handles)

IE starts with 12 handles (having about:blank as homepage), then it
takes randomly another 2 or 4 handles each time I load the age/press
F5. This appears even if the page loaded is a 403 for instance. It's
not related to user auth scheme (I found this problem in out
application which is using NTML but it's the same even for anonymous
access). It's not related to membership of the server in zones - it
does the same when I put the server into "trusted" and when it's not
there. I've created small test page which allows you to test the
actions I mentioned (http://linda.cooper.cz/awe/test/ie/).

When the number of opened handles reaches 64k IE partly stops working,
if you had a server in "trusted" zone it starts to recognize it as
"internet" etc.

I'm going to test that on clean WindowsXP and then after each
servicepack/IE update to find the one which caused this problem but
this will take some time. Another clue might be that this behavior
can't be reproduced on Windows 2000 (SP4+windowsupdate).

Feel free to contact me if you need to clarify things/get additional
information.

With regards,
Martin