Hi
Well this is wierd!
I agree with you about Firefox, works fine. But I have tested your page on IE6, 7, 8 and they all remove the yellow highlighted end tags. Are you pasting the HTML into the HTML view, then switching to Normal and back to HTML? Does it every time here!
Hohum not sure what to say!
<div id="tickerContainer">
<dl id="ticker">
<dt class="heading"><a href="#">This is a news title!</a></dt>
<dd class="text">This is a snippet of the news. It could be the whole news item or it could link to another page containing...</dd>
<dt class="heading">News Heading 2</dt>
<dd class="text">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</dd>
<dt class="heading">News Heading 3</dt>
<dd class="text">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</dd>
<dt class="heading">News Heading 4</dt>
<dd class="text">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</dd>
<dt class="heading">This item is long!</dt>
<dd class="text">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. </dd></dl></div>