Tengo una tabla HTML y quiero la última fila, excluyendo la fila con clase.table-bottom, y quitar suborder-bottom:

<table cellpadding="0" cellspacing="0" style="width:752px;" class="table">
    <tr class="table-top"><th style="width:40px;">ID</th> <th>Post title</th> <th>Date</th> <th>Owner</th> <th style="width:100px;">Actions</th></tr>
    <tr class="table-middle"><td>1</td> <td>Test</td> <td>16.7.2013</td> <td>Admin</td> <td>Delete</td></tr>
    <tr class="table-middle"><td>2</td> <td>Test 2</td> <td>3.8.2013</td> <td>Admin</td> <td>Delete</td></tr>
    <tr class="table-bottom"><td colspan="5"></td></tr>
</table>

.table tr th {
color:#929191;
font-weight:bold;
font-size:14px;
text-align:left;
padding-left:19px;
border-right:1px solid #d7d7d7;
border-bottom:1px solid #d7d7d7;
}
.table tr th:last-child {
border-right:none;
}
.table tr td {
color:#929191;
font-weight:bold;
font-size:12px;
padding:19px;
border-right:1px solid #d7d7d7;
border-bottom:1px solid #d7d7d7;
}
.table tr td:last-child {
border-right:none;
}
.table .table-middle:last-of-type td {
border-bottom:none;
background:red;
}
.table tr.table-middle td:first-child {
text-align:center;
}
.table tr th:first-child {
text-align:center;
padding-left:0px;
}
.table tr.table-bottom td {
border-right:none;
border-bottom:none;
}

Pero el.table .table-middle:last-of-type td El selector no funciona.

Aquí está elViolín.

¿Algunas ideas?