KendoUI Grid empty header

by zacharydl

HTML

<script src="http://cdn.kendostatic.com/2013.2.716/js/kendo.all.min.js"></script>
<link rel="stylesheet" href="http://cdn.kendostatic.com/2013.2.716/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2013.2.716/styles/kendo.default.min.css">
<table id="table1">
    <colgroup>
        <col style="width:180px" />
        <col />
        <col style="width:130px" />
        <col style="width:120px" />
    </colgroup>
    <thead>
        <tr>
            <th>Heading1</th>
            <th>Heading2</th>
            <th>Heading3</th>
            <th>DeleteMe</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Column1</td>
            <td>Column2his link.</td>
            <td>Column3</td>
            <td><a class="k-button">Button1</a>

            </td>
        </tr>
    </tbody>

JavaScript

$('#table1').kendoGrid();