I'd like to make another request and that is for the way the footer widgets work be duplicated and used in the header widget area with options to make them 1 ,2, 3, etc columns in the Options section.
It should be easy enough for me to implement but thought it would be a great future addition to the theme. It will also solve the header background issue if you move the
<?php if ( is_active_sidebar('widgets_header') ) dynamic_sidebar('widgets_header'); ?>
outside (beneath the closing header div and endif into its own header-widgets div
You could even expand this to the widget areas like Below Menu, Before Content and After Content. I know it gets a bit much but it would really provide a very flexible layout.
Again just a suggestion :)