Look for the following code:-
.............<div class="navbar">
<div class="inner"><span class="corners-top"><span></span></span>
<ul class="linklist navlinks">
<li class="icon-home"><a href="./index.php?sid=291d87be7fe1fa0839cb0fe290e201b5" accesskey="h">Board index</a> </li>
<li class="rightside"><a href="#" onclick="fontsizeup(); return false;" onkeypress="fontsizeup(); return false;" class="fontsize" title="Change font size">Change font size</a></li>
</ul>
You probably put extra ul and li tags with links in here, after the change font size icon and before the right side FAQ link
<ul><li>..........extra links to Home etc..........</li></ul>
<ul class="linklist rightside">
<li class="icon-faq"><a href="./faq.php?sid=291d87be7fe1fa0839cb0fe290e201b5" title="Frequently Asked Questions">FAQ</a></li>...........
but you will probably get an extra row unless you can float the new ul tag float: left; and make the following <ul class="linklist rightside"> float: right; so that they are on the same row.
Code downloaded to my PC will be deleted in due course.
WIN7; IE9, Firefox, Opera, Chrome and Safari for Windows; screen resolution usually 1366*768.
Also IE6 on W98 with 800*600 and IE8 on Vista 1440*900.