[Abe1]

LOL

Replace:

<!-- post thank you hack -->
<a href="newreply.php?do=post_thanks&amp;p=$post[postid]"><img src="$stylevar[imgdir_button]/post_thanks.gif" alt="$vbphrase[post_thanks_thanks]" border="0" ></a>
<!-- end post thank you hack -->

with

<!-- post thank you hack -->
<if condition="$post[postcount]==1"><a href="newreply.php?do=post_thanks&amp;p=$post[postid]"><img src="$stylevar[imgdir_button]/post_thanks.gif" alt="$vbphrase[post_thanks_thanks]" border="0" ></a></if>
<!-- end post thank you hack -->

you can leave legacy alone if you don't use it.