<!DOCTYPE HTML>
<html>
<head>
  <title>Resize Reflow Test</title>
  <style>
    html, body { margin: 0; padding: 0; }
    html { overflow: hidden }
  </style>
</head>
<body>

<div style="-moz-column-width: 12em;
            border: silver solid;
            height: 5em;">
  <div style="border: solid;
              background: aqua;
              color: gray;">
        blah<br>
        blah<br>
        blah<br>
        blah
  </div>
</div>

</body>
</html>