it seems you have made some changes since your last post. But this seems to work.
#blog-title a {
-moz-background-clip:border;
-moz-background-inline-policy:continuous;
-moz-background-origin:padding;
background:transparent url(../thematic/images/header.jpg) no-repeat scroll left bottom;
display:block;
height:288px;
margin-bottom:-75px;
width:500px;
This is what I used to add 2 divisions to my header area
<?php //Adding to the header section behind the branding section - good right align logo
function inserticon() { //if page loads too slow change image file to billboard-RSS-150-single-2.png
?>
<div id="headericon">
</div>
<div id="rss-image">
<a href="http://feeds.feedburner.com/RAndROn-lineBusinessServices" target="_blank"><img class="rss-link" type="application/rss+xml" title="Get Our Articles by RSS" src="http://www.we-relax.com/web-elements/billboard-RSS-150-2.gif" alt="subscribe to RSS Feeds" border="none" /></a>
</div>
<?php
}
add_filter('thematic_header', 'inserticon',0);
?>