Help: Remove space between bottom-border (a line) between posts

I am hoping someone can help.

I’ve added a line between posts on my main page as below. However there’s a large space which emerges between the between the bottom-border and next post header. I don’t know where it came from and I am not sure how to fix it.

Look at the problem: Flaash.org

In my style.css:
.clearfloat{
clear:both;
}
.border_bottom{
border-bottom:1px #e2e2e2 solid;
padding-bottom:9px;}

In my index.php:
</div> <!– article –>
<div class=”clearfloat border_bottom”>
</div> <!– block –>

Also, for some reason the line does not appear when I put the code before the </div> <!– article –>. I am not sure if it’s because I am using the “Thumbnail For Excerpts” Plugin.

Can anyone help?

I can’t figure out for the life of me and would appreciate a solution so I don’t lose my head ??