New partner with no adress type defined

When creating a new partner, if we begin to introduce informations in the address tab but we omit to define the address type and then we try to introduce a new bank relation into the accounting tab, system crash with the following error :

File "/usr/lib/python2.5/site-packages/openerp-server-5.0.3.1/bin/osv/osv.py", line 59, in wrapper
[2009-09-09 11:39:10,057] ERROR:web-services:[18]: return f(self, dbname, *args, **kwargs)
[2009-09-09 11:39:10,057] ERROR:web-services:[19]: File "/usr/lib/python2.5/site-packages/openerp-server-5.0.3.1/bin/osv/osv.py", line 118, in execute
[2009-09-09 11:39:10,057] ERROR:web-services:[20]: res = pool.execute_cr(cr, uid, obj, method, *args, **kw)
[2009-09-09 11:39:10,058] ERROR:web-services:[21]: File "/usr/lib/python2.5/site-packages/openerp-server-5.0.3.1/bin/osv/osv.py", line 110, in execute_cr
[2009-09-09 11:39:10,058] ERROR:web-services:[22]: return getattr(object, method)(cr, uid, *args, **kw)
[2009-09-09 11:39:10,058] ERROR:web-services:[23]: File "/usr/lib/python2.5/site-packages/openerp-server-5.0.3.1/bin/osv/orm.py", line 1991, in default_get
[2009-09-09 11:39:10,059] ERROR:web-services:[24]: value[f] = self._defaults[f](self, cr, uid, context)
[2009-09-09 11:39:10,059] ERROR:web-services:[25]: File "/usr/lib/python2.5/site-packages/openerp-server-5.0.3.1/bin/addons/base/res/partner/partner.py", line 418, in <lambda>
[2009-09-09 11:39:10,060] ERROR:web-services:[26]: cursor, user, 'name', context=context),
[2009-09-09 11:39:10,060] ERROR:web-services:[27]: File "/usr/lib/python2.5/site-packages/openerp-server-5.0.3.1/bin/addons/l10n_ch/partner.py", line 72, in _default_value
[2009-09-09 11:39:10,060] ERROR:web-services:[28]: value = address[field]
[2009-09-09 11:39:10,061] ERROR:web-services:[29]: KeyError: 'name'

the eror could maybe be resolved by adding a default value in the address type when creating a new partner..