=== modified file 'account/account.py'
--- account/account.py	2012-04-03 08:29:06 +0000
+++ account/account.py	2012-04-09 15:57:42 +0000
@@ -29,6 +29,7 @@
 from osv import fields, osv
 import decimal_precision as dp
 from tools.translate import _
+from tools import float_round
 
 def check_cycle(self, cr, uid, ids, context=None):
     """ climbs the ``self._table.parent_id`` chains for 100 levels or
@@ -2069,7 +2070,7 @@
             }
         """
         precision = self.pool.get('decimal.precision').precision_get(cr, uid, 'Account')
-        totalin = totalex = round(price_unit * quantity, precision)
+        totalin = totalex = float_round(price_unit * quantity, precision)
         tin = []
         tex = []
         for tax in taxes: