I cannot remove padding adjacent to a link in this page
I have reduced the problem to the bare minimum so its really clear.
I could try forcing the width of the div but I want to know why having two elements side by side makes the total wider than the sum of the parts.
You can see my issue here http://www.yart.com.au/stackoverflow/adjacent_a.png 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<style type="text/css">
*
{
padding:0;
margin:0;
font:15px arial;
}
div
{
display :inline;
background-color:Red;
height:18px;
}
.MenuItemMove
{
display:inline-block;
background-image: url(http://www.yart.com.au/stackoverflow/page_move.gif);
background-repeat:no-repeat;
width:18px;
height:18px;
vertical-align:top;
}
</style>
</head>
<body>
<div>
<a href="#" class="MenuItemMove"></a>
<a href="#" class="MenuItemMove"></a>
</div>
</body>
</html>