[fib]

Just an addition -it needs done for both a new post (strong) thread and a read thread.

This may be a longer way around (I am no expert but this worked for me)
Thank you to the original poster and the others.

Mine turned out like this

			<if condition="$show['gotonewpost']"><a href="showthread.php?$session[sessionurl]goto=newpost&amp;t=$thread[threadid]"><img class="inlineimg" src="$stylevar[imgdir_button]/firstnew.gif" alt="$vbphrase[go_to_first_new_post]" border="0" /></a></if>
			$thread[movedprefix]
			$thread[typeprefix]
			$thread[moderatedprefix]
			<if condition="$show['gotonewpost']">
				<strong><a href="showthread.php?$session[sessionurl]t=$thread[threadid]$thread[highlight]" id="thread_title_$thread[realthreadid]">$thread[threadtitle]</a></strong>

<!-- 1st entry for post in new window -->
<a href="showthread.php?$session[sessionurl]t=$thread[threadid]$thread[highlight]" target="_blank"><img src="$stylevar[imgdir_misc]/new_window.gif" alt="open this thread in a new window" width="16" height="16" border="0"></a>
<!-- end 1st -->
			<else />
				<a href="showthread.php?$session[sessionurl]t=$thread[threadid]$thread[highlight]" id="thread_title_$thread[realthreadid]">$thread[threadtitle]</a>

<!-- 2nd entry for post in new window -->
<a href="showthread.php?$session[sessionurl]t=$thread[threadid]$thread[highlight]" target="_blank"><img src="$stylevar[imgdir_misc]/new_window.gif" alt="open this thread in a new window" width="16" height="16" border="0"></a>
<!-- end 2nd -->

			</if>

I have added the start of the if so you can see how it falls in.
I realise that I am no expert so be gentle.