link does not always appear

Hi there,

Hope someone can help.

I added a new link for my site called "lso student central"

here is the code below

[CODE]

<div id="container">
<div id="header">

<!-- end #header -->
<img src="images/lso_logo.jpg" alt="LSO Logo" width="412" height="143" /><img src="images/lso_banner.jpg" alt="LSO Banner" width="568" height="143" />
<ul>
<li><a href="#" class="currentmain">home</a></li>
<li><a href="courses.html">courses</a></li>
<li><a href="clinic.html">clinic</a></li>
<li><a href="research.html">research</a></li>
<li><a href="history.html">history </a></li>
<li><a href="library/library.html">LSO Student Central </a></li>
</ul>
</div>
[CODE]

Problem is that when viewing the site, the link sometimes does not appear e.g "LSO student central" link is not shown or disappears, but then on other on other machines browsers, the link appears fine. Anyone know what could the problem be?

Sometimes reloading the site and the link actually appears?!?!

The site is www.lso.ac.uk

Thanks in advance

Hello purge,
The only difference I can find is that all the pages menu looks like this -<div id="container">
<div id="header">
<!-- end #header -->

<img src="images/lso_logo.jpg" alt="LSO logo" width="412" height="143" /><img src="images/lso_banner.jpg" alt="LSO banner" width="568" height="143" />
<ul>
<li><a href="index.html">home</a></li>
<li><a href="#" class="currentmain">courses</a></li>
<li><a href="clinic.html">clinic</a></li>
<li><a href="research.html">research</a></li>
<li><a href="history.html">history </a></li>

</ul>
</div>
<div id="sidebar1">
<div id="leftnav1">


The http://www.lso.ac.uk/index.html is the only page that actually has an LSO Student Central link.

Thanks for the prompt reply.

I have not added the student central link to the other pages as yet, so no problems on that for now, still the other problem is so wierd.

On other machines, i go to google and type lso and then click the third search term and then the lso student central link does not appear, however in other machines I do the same and the link appears fine.

Some users type www.lso.ac.uk in the url and the "lso student central" link appears fine.

I am not sure if its the code, or host, maybe bad css code. Anyone know any reasons why this could happen?