[PS] Error when typing unsupported character in a recurring model and generating the entries

trunk, revno 3401

* Accounting/Configuration/Miscellaneous/Recurring Models, define a recurring model with name "%year". Then click on "created entries"

Obtained result : I get the following error :

Environment Information :
System : Linux-2.6.32-31-generic-i686-with-Ubuntu-10.04-lucid
OS Name : posix
Distributor ID: Ubuntu
Description: Ubuntu 10.04.2 LTS
Release: 10.04
Codename: lucid
Operating System Release : 2.6.32-31-generic
Operating System Version : #61-Ubuntu SMP Fri Apr 8 18:24:35 UTC 2011
Operating System Architecture : 32bit
Operating System Locale : fr_BE.UTF8
Python Version : 2.6.5
OpenERP-Client Version : 6.1-dev
Last revision No. & ID :1888 launchpad_translations_on_behalf_of_openerp-20110512043447-hhsojq69uot963ci
Traceback (most recent call last):
  File "/home/openerp/trunk/server/openerp/netsvc.py", line 410, in dispatch
    result = ExportService.getService(service_name).dispatch(method, auth, params)
  File "/home/openerp/trunk/server/openerp/service/web_services.py", line 598, in dispatch
    res = fn(db, uid, *params)
  File "/home/openerp/trunk/server/openerp/osv/osv.py", line 122, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/openerp/trunk/server/openerp/osv/osv.py", line 176, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/openerp/trunk/server/openerp/osv/osv.py", line 167, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/openerp/trunk/server/openerp/addons/account/wizard/account_use_model.py", line 66, in create_entries
    entry['name'] = model.name%{'year':time.strftime('%Y'), 'month':time.strftime('%m'), 'date':time.strftime('%d')}
ValueError: unsupported format character 'y' (0x79) at index 1

Expected result : the system provides a warning message

reported by dha, OpenERP Prof. Serv