=== modified file 'account/account_invoice.py'
--- account/account_invoice.py	2012-03-29 15:43:31 +0000
+++ account/account_invoice.py	2012-04-23 09:33:25 +0000
@@ -1584,7 +1584,7 @@
                 val['amount'] = tax['amount']
                 val['manual'] = False
                 val['sequence'] = tax['sequence']
-                val['base'] = tax['price_unit'] * line['quantity']
+                val['base'] = cur_obj.round(cr, uid, cur, tax['price_unit'] * line['quantity'])

                 if inv.type in ('out_invoice','in_invoice'):
                     val['base_code_id'] = tax['base_code_id']