<!DOCTYPE HTML>
<html>
<head>
<title>Pixel rounding testcase</title>
<style type="text/css">

html, body { margin: 0; border: none; padding: 0; }
img { position: absolute; top: -9.5px; left: -9.5px; }

</style>
</head>
<body>

<img class="s1" src="blue-25x25.png">

</body>
</html>