The previous behaviour used the uom of the product while it is not necessary the one selected (eg: by default the purchase unit of measure for purchase orders).
This was an issue especially when having a different uom with supplier info lines setting degressive prices. The price should be computed based on selected uom and not the product uom.
bzr revid: mat@openerp.com-
20140211152703-twnzco2dwxeqt8hz