=== modified file 'product/pricelist.py'
--- product/pricelist.py	2012-12-06 14:56:32 +0000
+++ product/pricelist.py	2013-01-24 14:13:51 +0000
@@ -233,7 +233,7 @@
                             else:
                                 price_tmp = self.price_get(cr, uid,
                                         [res['base_pricelist_id']], product_id,
-                                        qty, context=context)[res['base_pricelist_id']]
+                                        qty, partner, context=context)[res['base_pricelist_id']]
                                 ptype_src = self.browse(cr, uid, res['base_pricelist_id']).currency_id.id
                                 uom_price_already_computed = True
                                 price = currency_obj.compute(cr, uid, ptype_src, res['currency_id'], price_tmp, round=False)