How odd... it's displaying perfectly in FireFox, but not in IE.

The stylesheet.css is telling the browser

Code:
#logoWrapper{
	background-image: url(../images/header_bg.jpg);
	background-repeat: repeat-x;
	background-color: #ffffff;
	height:200px;
	}
while stylesheetOLD.css is telling the browser

Code:
#logoWrapper{
	background-image: url(../images/header_bg.jpg);
	background-repeat: repeat-x;
	background-color: #ffffff;
	height:75px;
	}
That's probably your problem.