A workaround would be to "manually" remove the arrows with the following JS / jQuery code:
$(function() {
$('li').removeClass("ui-btn-icon-right");
});
Here's a full working example, have a try:
<!DOCTYPE unspecified PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.0a2/jquery.mobile.structure-1.0a2.min.css" />
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.0a2/jquery.mobile-1.0a2.min.css" />
<script src="http://code.jquery.com/jquery-1.4.3.min.js"></script>
<script src="http://code.jquery.com/mobile/1.0a1/jquery.mobile-1.0a1.min.js"></script>
<script>
$(function() {
$('li').removeClass("ui-btn-icon-right");
});
</script>
</head>
<body>
<div data-role="page" id="p1">
<div data-role="content">
<ul data-role="listview" data-theme="a" >
<li><a href="#p2">Go to page 2</a></li>
<li><a href="#p3">Go to page 3</a></li>
</ul>
</div>
</div>
<div data-role="page" id="p2">
Hello! This is page 2!!!
</div>
<div data-role="page" id="p3">
Hello! This is page 3!!!
</div>
</body>
</html>
However, I suggest to get the latest version of jQuery Mobile (1.2 at the moment), which corrected several bugs and which is in this way more stable.
Check the website for more information: http://jquerymobile.com/
Hope this helps.