At test.php - Using Firebug, (html tab) and selecting:
<ul id="cssmw3" class="level-0"> /* This one */
and then clicking on 'Edit', I get:
<ul id="cssmw3" class="level-0">
<font color="white"><li class="link"><a href="/index.php" class="link">Home Page</a></li>
<li class="parent link"><a href="/about.php" class="link">About</a>
Removing the '<font color="white">' from that block solves the problem. However, looking at the page code of both this page and the CSSMenuWriter/cssmw3/menu.php page, and all the css, I'm at a loss as to where that comes from or how it inserts into menu ul.at that point.
Hopefully soneone can diagnose how it's getting inserted there, or it would help if you could zip that actual page and upload it as an attachment here.