http://www.ternyata.org
WP 2.9.1
Ata 3.4.4
hosted at 1and1
Checked behaviour in IE 8.0x, Firefox 3.6, Chrome 4.0.x, Opera 10.10

Have inserted a number of links in the footer of the site. One of them does not show in any browser. All the others do.

Here is my code from the ATO > Style & Edit Footer Section:

<a href="contact">Contact Ternyata Ltd.</a> ||| <a href="http://www.wisdomofwhores.com" target="_blank">Go to Elizabeth Pisani's Blog</a> ||| <a href="http://www.ternyata.org/sitemap.html">Sitemap</a>
<br>Copyright &copy; %current-year% %home% - All Rights Reserved ||| Ternyata Limited is a UK Registered company # 7119741 ||| Built by <a href="http://www.zipsziggurat.com">Mark Zip</a>

The "Sitemap" link is not visible. All others are. What the ... ?

works for me, put each '<a' starting a new line and make sure there are no unprintable characters anywhere

That did the trick. Thanks.