Nope. Not a bug. An HTML typo. See below (taken from your code). Remove the extra <TR> and you're all set.
Code:
<tr>
<td style="background: url('/images/navBtnBack.jpg') no-repeat; padding-left: 20px; height: 23px;">
<img src="/images/blueBullet.jpg" align="top" id="n6" alt="b"/><a href="/index.php?main_page=advanced_search" class="navLink" onMouseOver="highlightMenu('n6');" onMouseOut="unHighlightMenu('n6');"style="text-decoration:none; padding-left:2px;">site search</a></td>
</tr>
<tr>
<tr>
<td style="background: url('/images/navFade.jpg') no-repeat top left;">
<!--// bof: testimonials_manager //-->
<div class="leftBoxContainer" id="testimonials-manager" style="width: 125">
<h3 class="leftBoxHeading" id="testimonials-managerHeading">Testimonials</h3>
<div id="testimonials-managerContent" class="sideBoxContent"><b><a href="http://pssllc.com/index.php?main_page=testimonials_manager&testimonials_id=3&zenid=55c2ff1dc8f782c66827151e16128ee4">Satisfied User</a></b><div class="testimonial"><p><p>If you've nosed around the DC50 website much you know that I'm a user who's not shy about pointing out glitches. The reasons I'm vocal about DC50...<br /><span><strong><a href="http://pssllc.com/index.php?main_page=testimonials_manager&testimonials_id=3&zenid=55c2ff1dc8f782c66827151e16128ee4">Read More <img src="/images/arrow.jpg"/></a></strong></span></p></div><hr id="catBoxDivider" /></div></div>
<!--// eof: testimonials_manager //-->
</td>
</tr>
</table>