Added a copy of Firebug Lite for debugging purposes. License is uncertain but being treated as MPL. (If is is not MPL then it is under something more permissive that permits relicensing anyway)
<div class="tblholder">
<table border="0" width="100%" cellspacing="1" cellpadding="4">
<tr>
<th colspan="2" style="text-align: left;">{DATETIME}</th>
</tr>
<tr>
<td style="width: 120px; height: 100%;" rowspan="4" valign="top" class="row1<!-- BEGIN is_friend --> row1_green<!-- END is_friend --><!-- BEGIN is_foe --> row1_red<!-- END is_foe -->">
<table border="0" width="100%" style="height: 100%;" cellspacing="0" cellpadding="0">
<tr>
<td valign="top" class="row1<!-- BEGIN is_friend --> row1_green<!-- END is_friend --><!-- BEGIN is_foe --> row1_red<!-- END is_foe -->">
<b>{NAME}</b><br />
<small>{USER_LEVEL}</small>
<!-- BEGIN user_has_avatar -->
<div class="avatar">
<a href="{USERPAGE_LINK}">
<img alt="{AVATAR_ALT}" src="{AVATAR_URL}" style="border-width: 0px;" />
</a>
</div>
<!-- END user_has_avatar -->
</td>
</tr>
<tr>
<td valign="bottom" class="row1<!-- BEGIN is_friend --> row1_green<!-- END is_friend --><!-- BEGIN is_foe --> row1_red<!-- END is_foe -->">
{SEND_PM_LINK} {ADD_BUDDY_LINK}
</td>
</tr>
</table>
</td>
<td class="row2">
<b>{lang:comment_lbl_subject}</b> <span id="subject_{ID}">{SUBJECT}</span>
</td>
</tr>
<tr>
<td class="row3">
<div id="comment_{ID}">{DATA}</div>
<!-- BEGIN signature -->
<hr style="margin-left: 1em; width: 200px;" />
{SIGNATURE}
<!-- END signature -->
</td>
</tr>
<!-- BEGIN can_edit -->
<tr>
<td class="row2">
[ {EDIT_LINK} | {DELETE_LINK} ]
</td>
</tr>
<!-- END can_edit -->
<!-- BEGIN auth_mod -->
<tr>
<td class="row1">
<b>{lang:comment_lbl_mod_options}</b> {MOD_APPROVE_LINK} {MOD_DELETE_LINK} | {MOD_IP_LINK}
</td>
</tr>
<!-- END auth_mod -->
</table>
</div>
<br />