I see a strange behaviour of Tiki Cart on 18.5, but I suspect it is not a bug, but an error on my (manual) implementation.
Users (members of Customers group) do not see product categories. "Category" gets written, but no content comes to this keyword... Furthermore, when users who are also Managers want to add a new product, they cannot set the category (resulting in not being able to add the product, because category is mandatory). No such problems as admin!
So I dug deep into permissions and compared them to a fresh install (actually a show2 instancce...) that had the profile applied. I see no difference!
I can resolve the issue by granting tiki_p_view_category to anonymous, and by removing the mandatory flag from the category field. But the profiled show2 installation does it without those two "hacks". So what might I be missing? The category field of the products tracker is, as default, set to be visible to all. What's possibly blocking the category display? Where can I look next?