I've set up a Promo code on my site with the setting for 'Restrict to Member Group' set to 'all'.
However the promo code only works if you are a logged in user, not if you are a guest. Even setting 'Restrict to Member Group' to 'guest' doesn't allow the promo code to be used by non-members.
Is seems to be a bug, has any one else any experience of this or even promo codes in general. This is the first time I have used one!?