I’m using your Abundance theme and recently upgraded to WooCommerce v2 (may be related to the problem)
I host with WP Engine and they have sent me some error messages coming from the theme:
1) [Wed Apr 17 15:16:33 2013] [error] [client xx.xxx.xxx.xxx] Directory index forbidden by Options directive: /nas/wp/www/sites/xxxxxxxxxx/wp-content/themes/abundance/framework/
2) [Wed Apr 17 17:31:27 2013] [error] [client xx.xxx.xx.xx] PHP Fatal error: Call to undefined function avia_get_frontpage_template() in /nas/wp/www/cluster-1335/xxxxxxxxxx/wp-content/themes/abundance/index.php on line 10
Are these errors you have seen before? Or maybe are aware of and putting into a theme update?