viewkeptthreads in admin

tdheader is wrong

In the "Send them a page section" change this:

<tr class="tdheader"><td>Unkeep</td>
<td>Subject</td>
<td>Posted by</td>
<td>Posted on</td></tr>

to this:

<tr><td class="tdheader">Unkeep</td>
<td class="tdheader">Subject</td>
<td class="tdheader">Posted by</td>
<td class="tdheader">Posted on</td></tr>