comment block not displaying properly outside of the designated block regions

Hello, thank you for your fantastic theme, I use it on my main site. This is a minor issue, but it would be good to get it fixed - I'd tell you exactly what to change but I have no idea about CSS. Here is an example of how the "recent comments" block looks on my site with the Newswire plugin:

http://drupal.org/files/sample1.jpg

I wanted to emulate this layout within a node, so I used the following code:

<div id="left" class="width-10-190">
<div id="block-comment-0" class="block block-comment region-even even region-count-2 count-2 ">
<div class="block-wrapper">
<h2 class="title"><span>Recent Comments</span></h2>
<div class="content">
<?php
$block = module_invoke('comment', 'block', 'view', 0);
print $block['content'];
?>
</div>
</div>
</div>
</div>

I basically just took this from the layout within the original block. It works fine, except that the first item in the list has no break tag (<br>) between the comment and the timestamp, so it looks like this: http://drupal.org/files/sample2.jpg (note that the the timestamp after the first comment is not on a new line this time).

So I suspect this is because, for some reason, the "first" class of the list items is not working properly.