I had a problem that my site lost all it's css layout when I upgraded. In the source code from the web browser I could see this:
<link rel="stylesheet" href="/?bfa_ata_file=css" type="text/css" media="all" />Looking at the header.php file I can see that version 3.6 shows:
<link rel="stylesheet" href="<?php echo $homeURL; ?>/?bfa_ata_file=css" type="text/css" media="all" />where as in 3.5 the code was
<link rel="stylesheet" href="<?php bloginfo('url'); ?>/?bfa_ata_file=css" type="text/css" media="all" />not sure why $homeURL; hasn't worked.
John