Comment 25 for bug 613286

@Olivier, we think it's better to keep this correction in the core instead of developing a new module because the average cost price concept is in the core and the return cost price is wrong. Adding a new module to correct a wrong behaviour does not seem to be the good solution as many OpenERP users won't be advised to install such a module and they will have the same story that Nhomar... (financial audit, 100s hours work...).