Comment 41 for bug 882036

This issue is not completely fixed. The float_round method you added in the server must be used in the addons.
Here is a example of patch to fix a.o. the taxes computation in the addons:

=== modified file 'account/account.py'
--- account/account.py 2012-03-22 12:24:19 +0000
+++ account/account.py 2012-07-17 11:17:12 +0000
@@ -29,6 +29,7 @@
 from osv import fields, osv
 import decimal_precision as dp
 from tools.translate import _
+from tools import float_round as round

 def check_cycle(self, cr, uid, ids, context=None):
     """ climbs the ``self._table.parent_id`` chains for 100 levels or

=== modified file 'account/account_bank_statement.py'
--- account/account_bank_statement.py 2012-03-22 11:39:59 +0000
+++ account/account_bank_statement.py 2012-07-17 11:23:22 +0000
@@ -24,6 +24,7 @@
 from osv import fields, osv
 from tools.translate import _
 import decimal_precision as dp
+from tools import float_round as round

 class account_bank_statement(osv.osv):