missing ending span in readmsg.html template

Hi,

 HTML validator (http://validator.w3.org/) fails to readmsg templates
On an address header display, a </span> is missing with sqwebmail 4.0.6

Here is a sample output (lines feeds are mine):

<tr valign="baseline">
<th align="right" class="message-rfc822-header-name">
To:
<span class="tt">
&nbsp;
</span>
</th>
<td>
<span class="message-rfc822-header-contents">
<a href="XXX?folder=INBOX&amp;form=quickadd&amp;pos=23&amp;newname=lwa%40XXX&amp;newaddr=lwa%40XXX" style="text-decoration: none" onmouseover="window.status='Ajouter au carnet d\'addresses'; return true;" onmouseout="window.status=''; return true;" >
<span class="message-rfc822-header-address">
lwa@XXX
</a>               <------- no </span> here 
</span>
</td>
</tr>

I'm unsure of the need of the starting <span>.
A <a class="message-rfc822-header-address" ...> should be enough.