I search loads of posts for a good tutorial on how to insert google adsense into the last post of a vbulliten forum and most always left a white screen while using the quick reply option.
However this one works perfectly....
<if condition="(($post[postcount] % $vboptions[maxposts] == 0) or ($post[islastshown] and !$GLOBALS['vbulletin']->GPC['ajax']))">
<div style="padding:6px 0px 0px 0px;margin-top:4px;">
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<tr>
<td class="thead" align="left">Text You Want to show up in Ad Here
</tr>
<tr>
<td class="alt1" align="center">
Adsense Code here
</td>
</tr>
</table>
</div>
</if>