As Fabien indicates, the fallback on account taxes should be implemented in all of OpenERP for consistency. A quick grep reveals that the following modules are affected: account, delivery, mrp_repair, hr_expense, point_of_sale, purchase, sale & stock. To strictly fit the goals of OCB, we should accomodate the vision of upstream OpenERP so the proposed patch should adapt the behaviour in all of these modules.
As Fabien indicates, the fallback on account taxes should be implemented in all of OpenERP for consistency. A quick grep reveals that the following modules are affected: account, delivery, mrp_repair, hr_expense, point_of_sale, purchase, sale & stock. To strictly fit the goals of OCB, we should accomodate the vision of upstream OpenERP so the proposed patch should adapt the behaviour in all of these modules.