=== modified file 'sale/sale.py'
--- sale/sale.py	2010-10-15 16:56:24 +0000
+++ sale/sale.py	2010-10-16 10:04:47 +0000
@@ -221,7 +231,7 @@
                 if arg[2]:
                     clause += 'AND inv.state = \'paid\''
                 else:
-                    clause += 'AND inv.state <> \'paid\''
+                    clause += 'AND inv.state not in ( \'paid\',\'cancel\')'
                     no_invoiced = True
         cursor.execute('SELECT rel.order_id ' \
                 'FROM sale_order_invoice_rel AS rel, account_invoice AS inv ' \