I am running WC 2.0.12 and Superstore by WooThemes, stock - aside from a Flickr plugin. WP 3.5.2 and no SOAP issues or WP memory limit issues. The site works fine, save for some intermittent problem with the cart.
Editing items in the cart, changing quantities, deleting items, performing checkout functions etc. sometimes results in the URL reloading as an error 302 page full of TXT. The URL will not change from the page you are on ( /cart ) for instance. Occasionally, a product may load in the same manner when accessed from the cart. This is not occurring in IE or Safari and is not being caused by the one non-packaged, WooTheme plugin I have running.