draskers on "[Plugin: WooCommerce - excelling eCommerce] Memory error even with 128M allocated"

Hi, I'm hoping someone can help as i'm struggling with a memory error when adding or removing items from the WooCommerce cart page. The error displayed is:

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 523800 bytes) in /home/thekitch/public_html/wp-includes/formatting.php on line 940

I have configured the Wordpress file: wp-config.php with the following code on line 36/37:

/** Memory Limit */
define('WP_MEMORY_LIMIT', '128M');

When checking the WooCommerce/System Status the WP Memory Limit is set correctly showing 128MB.

I'm on WooCommerce version 2.0.13 and use a theme called Sold! My site, if needed is http://www.thekitchenshelf.co.uk

Looking forward to hearing people thoughts - especially on the "formatting.php on line 940" part which I really don't understand.

Many thanks, David

http://wordpress.org/plugins/woocommerce/