Completely Weird Dialog behavior

Completely Weird Dialog behavior


Hi all
This is the link to play with
http://www.matrixconnects.com/newsite/mweb/test.html
All I have done is, copied the code "as it is" (do a view source if
you like) from the Jquery example given at
http://docs.jquery.com/UI/Dialog
But as you will notice if you navigate to my page using IE and resize
the dialog, the X button disappears on shrinking the dialog. This is
not a problem while using FF.
Does anyone has any idea why is this happening? Could it be something
to do with web server as that is the only thing I can think of. I am
using IIS to host this site. Basically the site is hosted with
Discountasp.net who use IIS7 to host my site.
I see the same behavior if I host this page locally on IE5 or IE6.
Please HELP!
Best,
Nik