install wizard for outlook (or thunderbird) crash

How to reproduce the bug, install a new DB, install CRM, thunderbird and outllook plugin

I get this during configuration :

Environment Information :
System : Linux-2.6.35-23-generic-x86_64-with-Ubuntu-10.10-maverick
OS Name : posix
Distributor ID: Ubuntu
Description: Ubuntu 10.10
Release: 10.10
Codename: maverick
Operating System Release : 2.6.35-23-generic
Operating System Version : #41-Ubuntu SMP Wed Nov 24 11:55:36 UTC 2010
Operating System Architecture : 64bit
Operating System Locale : fr_BE.UTF8
Python Version : 2.6.6
OpenERP-Client Version : 6.0.0-rc1-1
Last revision No. & ID :Bazaar Package not Found !Traceback (most recent call last):
  File "/home/openerp/trunk/openobject-server/bin/netsvc.py", line 489, in dispatch
    result = ExportService.getService(service_name).dispatch(method, auth, params)
  File "/home/openerp/trunk/openobject-server/bin/service/web_services.py", line 598, in dispatch
    res = fn(db, uid, *params)
  File "/home/openerp/trunk/openobject-server/bin/osv/osv.py", line 122, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/openerp/trunk/openobject-server/bin/osv/osv.py", line 176, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/openerp/trunk/openobject-server/bin/osv/osv.py", line 167, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/openerp/trunk/openobject-server/bin/osv/orm.py", line 1770, in fields_view_get
    xarch, xfields = self.__view_look_dom_arch(cr, user, result['arch'], view_id, context=ctx)
  File "/home/openerp/trunk/openobject-server/bin/osv/orm.py", line 1455, in __view_look_dom_arch
    fields = self.fields_get(cr, user, fields_def.keys(), context)
  File "/home/openerp/trunk/openobject-server/bin/addons/base/res/res_config.py", line 383, in fields_get
    _('\n\nThis addon is already installed on your system'))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 39: ordinal not in range(128)