The site is up at: http://ajf.me/stuff/eva at the time of writing. The source code is this:
<!DOCTYPE html>
<htmlstyle="height:100%;">
<head>
<title>eva</title>
</head>
<bodystyle="background-color: black;background-image:url('eva.png');background-repeat: no-repeat;background-position: center center;height:100%;margin:0px;padding:0px;">
<audioautoplayloop>
<sourcesrc="eva.mp3"type="audio/mpeg"/>
<sourcesrc="eva.ogg"type="audio/ogg"/>
<sourcesrc="eva.wav"type="audio/wav"/>
</audio>
</body>
</html>
The audio plays fine in Chrome, IE9, and Firefox, but does not loop in the latter. The audio file can't be malformed, as it was produced by Audacity. Is there any other explanation for why it doesn't loop?