Great theme - thanks for your work :)
I've noticed that when using AIOSEO this theme produces duplicate description tags - one generated by header.php outputting the theme's description and the page/post specific description tag generated by AIOSEO.
Have you considered adding an SEO switch to the theme to turn off the default description when an SEO plugin is active?
The Thematic framework currently builds a switch to control a variety of SEO related functions around the following - which may need updating but gives the general idea:
if ( class_exists('All_in_One_SEO_Pack') || class_exists('HeadSpace_Plugin') || class_exists('Platinum_SEO_Pack') || class_exists('wpSEO') || defined('WPSEO_VERSION') )