Error when trying to add new translations

[Nicolas DS]

Server-trunk: 1259

When I try to add a new translation by using: Administration->Translations->Load an official translation->I choose a langage.

->Start installation

Then I received an error:
Traceback (most recent call last):
  File "/usr/local/lib/openerp/server/bin/netsvc.py", line 386, in run
    r = m(*msg[2:])
  File "/usr/local/lib/openerp/server/bin/service/web_services.py", line 431, in execute
    return self._execute(db, uid, wiz_id, datas, action, context)
  File "/usr/local/lib/openerp/server/bin/service/web_services.py", line 411, in _execute
    return wiz.execute(db, uid, self.wiz_datas[wiz_id], action, context)
  File "/usr/local/lib/openerp-trunk/server/bin/wizard/__init__.py", line 165, in execute
  File "/usr/local/lib/openerp-trunk/server/bin/wizard/__init__.py", line 73, in execute_cr
  File "/usr/local/lib/openerp-trunk/server/bin/addons/base/module/wizard/wizard_module_lang_install.py", line 54, in _lang_install
  File "/usr/local/lib/openerp-trunk/server/bin/addons/base/module/module.py", line 604, in update_translations
  File "/usr/local/lib/openerp/server/bin/tools/translate.py", line 484, in trans_load
    r = trans_load_data(db_name, fileobj, fileformat, lang, strict=strict, verbose=verbose)
  File "/usr/local/lib/openerp/server/bin/tools/translate.py", line 510, in trans_load_data
    lang_name = languages.get(lang, lang)
AttributeError: 'list' object has no attribute 'get'