NextGen inline CSS causes rendering problem in Chrome

Just updated WordPress, and now I have a rendering issue in Google Chrome. Seems to come from inline CSS related to NextGen. Here’s the code I’m looking at:

<meta name='NextGEN' content='1.7.4' />
<style type="text/css" media="print">#wpadminbar { display:none; }</style>
<style type="text/css">
	html { margin-top: 28px !important; }
	* html body { margin-top: 28px !important; }
</style>
<style type="text/css" media="screen">
	.ngg-gallery-thumbnail {
		margin-right: 0px;
	}
</style>
</head>

I have a white block exactly 28 pixels high at the top of my page, only when viewed in Chrome (other browsers seem to ignore it). I went through all the NextGen CSS and code and can’t seem to find where it’s coming from. What gives, and how can I get rid of it?

Here’s the site in question:

Stremmel Gallery