=== modified file 'account/invoice.py'
--- account/invoice.py	2010-05-18 09:45:30 +0000
+++ account/invoice.py	2010-06-09 13:57:49 +0000
@@ -1240,10 +1245,10 @@
                 val={}
                 val['invoice_id'] = inv.id
                 val['name'] = tax['name']
-                val['amount'] = tax['amount']
+                val['amount'] = cur_obj.round(cr, uid, cur, tax['amount'])
                 val['manual'] = False
                 val['sequence'] = tax['sequence']
-                val['base'] = tax['price_unit'] * line['quantity']
+                val['base'] = line.price_subtotal
 
                 if inv.type in ('out_invoice','in_invoice'):
                     val['base_code_id'] = tax['base_code_id']