Placement of menu in IE6

Hello,

I am having a problem in IE with my menu tabs. I want them to appear
alligned on the bottom of my header, and therefore I have positioned
my header relatively to set a positioning context, and used absolute
positioning to place my menu at the bottom of the header. In Mozilla
this approach works perfectly, but IE ignores the positioning context
set by the header and places the menu at the bottom of the screen. You
can see the page at http://jeroensangers.com/, and I included the
relevant code below.

Thanks in advance!

Jeroen Sangers
http://jeroensangers.com/

-------------------------------------------------
<div id="header">
<a href="/" accesskey="1">Braintags</a>
<ol id="sectiontabs">
<li><a href="#" class="current">home</a></li>
<li><a href="/archives/">archives</a></li>
<li><a href="http://photos.jeroensangers.com/">photos</a></li>
<li><a href="/sitemap/">sitemap</a></li>
</ol>
</div>

#header {position:relative}
#sectiontabs{position:absolute;bottom:0}