I have just viewed the source and this is what I see.
<li><h2>About this Blog</h2>
An online educational technology resource for teachers and staff at <A HREF="http://www.ncs-nj.org" target="_blank">Northfield Community School</A><em> (and the rest of the world)!</em>
<li><h2>The Man Behind the Curtain</h2>
I'm Kevin Jarrett, K-4 Computer Teacher & Technology Facilitator here at NCS. <a href="http://www.kjarrett.northfield.site.eboard.com">Visit my eBoard</a> for more great EDTECH resources! Have a question? <a href="http://www.ncs-tech.org/?p=286">Get in touch</a>.
At the very end of it all, you have an open
<li> and closing
</li> with nothing in there. :/ Also, to fix that 1px off footer problem..I posted some fixes on my test blog.
This will help it view the same in both IE and FF. As well as the search button. Also, if you'd like. Just download a fixed copy of mine here.
Upload everything except for the header image. I hope this helps. =)