[TYPO3] Strange display problem with TYPO3 and Vista

[Nate Russell]

Hello,

Sorry, I double posted this in typo3.design but then I noticed that nobody has posted there in the 
last 3 months.

I'm having a strange problem with a site when it is displayed on Windows Vista, either in IE 7 or 
Firefox.

I don't know if the problem is caused by TYPO3 or not.

http://new.eeiu.org
If you go to this page on Mac or Windows XP, you should see an image at the top in the header with a 
logo and writing over a maroon background.

If you load this page in a browser on Vista, you will see just a maroon bar across the top with no 
graphic loaded.

If you view the page source on an XP machine, you will see the code on Line 52:
<div id="wrapper"><div id="header"><img 
src="http://new.eeiu.org/fileadmin/images/EEIUlogobanner.jpg" alt=""></div>

If you view the page source on Vista, either in IE 7 or Firefox, the line is truncated to:
<div id="wrapper"><div id="header"><!--                             --></div>

My Questions...
1. Can somebody running Vista please confirm that they see the same thing?

2. Does anybody know what could be causing this? Extension maybe? I have a pretty bare bones 
installation set up right now. Server Config? I have nothing special configured. Like I said on Mac 
and XP it works fine.

Thanks in advance for any tips,

Nate