I am getting ready to upgrade to woocommerce 2.0 using the MYSTYILE theme.
On my test server I updated and I get the Purple warning Block in the back end.
Your theme does not declare woocommerce support - If you encounter layout issues please read out integration guide or choose a woocommerce theme.
Mystile is a woocommerce theme hasn't it been upgraded yet?
Everything seems to work fine on my test server thou but I get that warning in the back end of wordpress.