Error when clicking on "Send a message" or "Log a note"

[damdam-s]

Steps to reproduce:

• create a claim (rma)
• save it
• click on "Send a message" or "Log a note" links

Traceback (most recent call last):
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/http.py", line 537, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/http.py", line 574, in dispatch
    result = self._call_function(**self.params)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/http.py", line 310, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/service/model.py", line 113, in wrapper
    return f(dbname, *args, **kwargs)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/http.py", line 307, in checked_call
    return self.endpoint(*a, **kw)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/http.py", line 803, in __call__
    return self.method(*args, **kw)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/http.py", line 403, in response_wrap
    response = f(*args, **kw)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/addons/web/controllers/main.py", line 948, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/addons/web/controllers/main.py", line 940, in _call_kw
    return checked_call(request.db, *args, **kwargs)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/service/model.py", line 113, in wrapper
    return f(dbname, *args, **kwargs)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/addons/web/controllers/main.py", line 939, in checked_call
    return getattr(request.registry.get(model), method)(request.cr, request.uid, *args, **kwargs)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/api.py", line 241, in wrapper
    return old_api(self, *args, **kwargs)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/api.py", line 335, in old_api
    recs = self.browse(cr, uid, [], context)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/api.py", line 241, in wrapper
    return old_api(self, *args, **kwargs)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/models.py", line 5254, in browse
    return self._browse(Environment(cr, uid, context or {}), ids)
  File "/srv/openerp/instances/openerp-oca-runbot/parts/odoo-extra/runbot/static/build/3115739-8-0-3527c9/openerp/api.py", line 723, in __new__
    self.cr, self.uid, self.context = self.args = (cr, uid, frozendict(context))
TypeError: cannot convert dictionary update sequence element #0 to a sequence