I've run into a similar problem on two separate sites I've updated and found the problem related to the renaming of some of the CSS properties. namely changing most things from "woocommerce_"... to "woocommerce-"...
My main problem was related to the styling of the tabs... also, it seems that my shopping cart widget (sidebar) is not working either.... still working on that one :)
I was forced to update the CSS for my theme (which was Woo Commerce Woo Theme) to reflect the update and that has thus far fixed everything.