Impossible to add a bank account on an employee

On an employee form, when you try to attach a bank account to your employee, you can define a new bank account, but this account isn't attached to the employee and when you search this last bank account, it doesn't appears in the list.

To reproduce (with demo data):

* Open the form of employee Quentin Paolino
* On the Miscellaneous tab, search a bank account, no account found
* Create a new one : Partner : OpenERP S.A - Type : Bank account - Bank : Reserve
    * First issue : on web client, the field 'Account number' isn't mandatory but on the GTK client, it's required.
* Save the new bank account.
* Second issue : At this moment, the bank account isn't attached to the employee
* Third issue : Search the last created bank account by clicking on the magnifying glass : No account found.