Hello,
I think you should link the header logo to the real public URL which is sometimes different than the real directory of the wordpress installation like the "original" code does.
Here is a patch to fix this :
--- /tmp/core.php.old 2011-10-31 18:20:17.294734541 +0100
+++ core.php 2011-10-31 18:20:43.122734557 +0100
@@ -49,7 +49,7 @@ class AC_Core {
<script type="text/javascript">
jQuery(document).ready(function() {
$logo_mark = jQuery('#header-logo');
- $site_url = jQuery('
');
- $site_url = jQuery('
');
$site_url.append($logo_mark);
jQuery('#site-heading').before($site_url);
});