Open UL tags

If you look at the this section of your code, where the UL tags are (in red), they aren't closed before another open UL tag. (They get closed farther down)

<h2 class="sidebar-title">Previous Posts</h2>

<ul id="recently">

<ul> <li><a href="http://ripcoco.blogspot.com/2006/05/blog-post_16.html"> </a></li>

<ul>
<li><a href="http://ripcoco.blogspot.com/2006/05/lunacy-as-explanation.html">"Lunacy as an explanation..."</a></li>

<ul>

<li><a href="http://ripcoco.blogspot.com/2006/05/blog-post.html">

</a></li>

<ul>
<li><a href="http://ripcoco.blogspot.com/2006/05/border-patrol-idiots.html">Border Patrol Idiots.....</a></li>

<ul>
<li><a href="http://ripcoco.blogspot.com/2006/05/mommy.html">Mommy!!</a></li>

<ul>
<li><a href="http://ripcoco.blogspot.com/2006/05/while-my-baby-walks-streets-of.html">...while my baby walks the streets of Baltimore.....</a></li>

<ul>
<li><a href="http://ripcoco.blogspot.com/2006/05/lost-in-translation.html">Lost in Translation...</a></li>

<ul>
<li><a href="http://ripcoco.blogspot.com/2006/05/fish-tale.html">A Fish Tale.....</a></li>

<ul>

<li><a href="http://ripcoco.blogspot.com/2006/05/too-soon.html">Too Soon?</a></li>

The next couple get closed properly (in green)

<ul>
<li><a href="http://ripcoco.blogspot.com/2006/05/thank-you-steven-colbert-via-huffpo.html">
Thank You Steven Colbert via HuffPo!
</a></li>

</ul>
<mainorarchivepage>

</mainorarchivepage><h2 class="sidebar-title">Archives</h2>

<ul class="archive-list">

<li><a href="http://ripcoco.blogspot.com/2006_01_01_ripcoco_archive.html">January 2006</a></li>

<li><a href="http://ripcoco.blogspot.com/2006_02_01_ripcoco_archive.html">February 2006</a></li>

<li><a href="http://ripcoco.blogspot.com/2006_03_01_ripcoco_archive.html">March 2006</a></li>

<li><a href="http://ripcoco.blogspot.com/2006_04_01_ripcoco_archive.html">April 2006</a></li>

<li><a href="http://ripcoco.blogspot.com/2006_05_01_ripcoco_archive.html">May 2006</a></li>

</ul>

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<iframe src="http://www.7is7.com/otto/countdown.html?year=2008&month=11&date=4&hrs=20&min=0&sec=0&tz=local&title=Countdown%20to%20the%202008%20US%20Presidential%20election&lang=en&bgcolor=%23CCFFFF" frameborder="1" height="365" scrolling="no" width="250"><a href="http://www.7is7.com/otto/countdown.html?year=2008&month=11&date=4&hrs=20&min=0&sec=0&tz=local&title=Countdown%20to%20the%202008%20US%20Presidential%20election&lang=en&bgcolor=%23CCFFFF">Countdown to the 2008 US Presidential election</a></iframe>

Then the UL tags then get all closed at the same time

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