It looks like it was emailed to you and the code we generated for your client was modified. Notice that there are many extra a tags incorrectly placed in the middle of the form or other links. Also, the img tag src was modified to have an extra a tag in it as well. Let me fix it for you:
<!-- BEGIN: Constant Contact Basic Opt-in Email List Form -->
<div align="center">
<table border="0" cellspacing="0" cellpadding="3" bgcolor="#ffffcc" style="border:2px solid #000000">
<tr>
<td align="center" style="font-weight:bold;font-family:Arial;font-size:12px;color:#000000">Join Our Mailing List</td>
</tr>
<tr>
<td align="center" style="border-top:2px solid #000000">
<form name="ccoptin" action="http://visitor.constantcontact.com/d.jsp" target="_blank" method="post" style="margin-bottom:2">
<input type="hidden" name="m" value="1101529521539">
<input type="hidden" name="p" value="oi">
<font style="font-weight:normal;font-family:Arial;font-size:12px;color:#000000">Email:</font> <input type="text" name="ea" size="20" value="" style="font-size:10pt;border:1px solid #999999">
<input type="submit" name="go" value="Go" class="submit" style="font-family:Verdana,Geneva,Arial,Helvetica,sans-serif;font-size:10pt">
</form>
</td>
</tr>
</table>
</div>
<!-- END: Constant Contact Basic Opt-in Email List Form -->
<!-- BEGIN: SafeSubscribe -->
<div align="center" style="padding-top:5px">
<a href="http://www.constantcontact.com/safesubscribe.jsp" target="_blank"><img src="http://img.constantcontact.com/ui/images1/safe_subscribe_logo.gif" border="0" width="168" height="14" alt=""/></a>
</div>
<!-- END: SafeSubscribe -->
Dave Berard
Senior Product Manager, Constant Contact