Using only the standard Paypal Standard for J2Store plugin, on occasion when a buyer reaches the Confirm Order stage, instead of seeing the Order Summary and Payment Method sectio and the "Place Order" button, we ocasionally see :
J2STORE_CHECKOUT_ERROR_PAYMENT_METHOD_NOT_SELECTED
With only one payment method available its always selected so I am puzzled why we see the message (and also why we see no language script for it in en_GB.COM_j2store.ini) - I have set as an override manually on this occasion.