I had the same problem. It has to do with the second template edit to the threadbit template.
I changed it to this instead:
Code:
<!-- vbPlaza start -->
<if condition="$show['gotonewpost']">
<strong><a href="showthread.php?$session[sessionurl]t=$thread[threadid]$thread[highlight]" id="thread_title_$thread[realthreadid]" <if condition="$thread['titlestyle']">style="$thread[titlestyle]"</if>>$thread[threadtitle]</a></strong>
</if>
<!-- vbPlaza end -->