In Odoo 7+, the sale view is much different. You no longer see a list of invoices or a list of delivery orders. You can however click View invoice or view delivery order from the header.
This is very troubling. It is quite common for companies to have multiple invoices or multiple delivery orders per sales order. Could an OpenERP guy please explain the decision to change this? - Correction, from the code, it will redirect to a list instead of a form view. Still, how come the lists were removed from the form view? It seems like it could be for a performance reason.
Is there community feedback before making this decision? Seems like this is a step backward, as it creates more work to see basic information about a sale.