Odoo Server Error

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/openerp/http.py", line 599, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/usr/lib/python2.7/dist-packages/openerp/http.py", line 636, in dispatch
    result = self._call_function(**self.params)
  File "/usr/lib/python2.7/dist-packages/openerp/http.py", line 315, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/service/model.py", line 113, in wrapper
    return f(dbname, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/http.py", line 308, in checked_call
    result = self.endpoint(*a, **kw)
  File "/usr/lib/python2.7/dist-packages/openerp/http.py", line 887, in __call__
    return self.method(*args, **kw)
  File "/usr/lib/python2.7/dist-packages/openerp/http.py", line 465, in response_wrap
    response = f(*args, **kw)
  File "/usr/lib/python2.7/dist-packages/openerp/addons/web/controllers/main.py", line 971, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/addons/web/controllers/main.py", line 963, in _call_kw
    return checked_call(request.db, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/service/model.py", line 113, in wrapper
    return f(dbname, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/addons/web/controllers/main.py", line 962, in checked_call
    return getattr(request.registry.get(model), method)(request.cr, request.uid, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/api.py", line 232, in wrapper
    return old_api(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/models.py", line 3168, in read
    result = BaseModel.read(records, fields, load=load)
  File "/usr/lib/python2.7/dist-packages/openerp/api.py", line 230, in wrapper
    return new_api(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/models.py", line 3214, in read
    values[name] = field.convert_to_read(record[name], use_name_get)
  File "/usr/lib/python2.7/dist-packages/openerp/models.py", line 5668, in __getitem__
    return self._fields[key].__get__(self, type(self))
  File "/usr/lib/python2.7/dist-packages/openerp/fields.py", line 807, in __get__
    self.determine_value(record)
  File "/usr/lib/python2.7/dist-packages/openerp/fields.py", line 914, in determine_value
    self.compute_value(recs)
  File "/usr/lib/python2.7/dist-packages/openerp/fields.py", line 869, in compute_value
    self._compute_value(records)
  File "/usr/lib/python2.7/dist-packages/openerp/fields.py", line 859, in _compute_value
    getattr(records, self.compute)()
  File "/usr/lib/python2.7/dist-packages/openerp/api.py", line 230, in wrapper
    return new_api(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/addons/currency_rate_update/model/company.py", line 32, in _compute_multi_curr_enable
    '!=', False)])
  File "/usr/lib/python2.7/dist-packages/openerp/api.py", line 230, in wrapper
    return new_api(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/api.py", line 463, in new_api
    result = method(self._model, cr, uid, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/models.py", line 1651, in search
    return self._search(cr, user, args, offset=offset, limit=limit, order=order, context=context, count=count)
  File "/usr/lib/python2.7/dist-packages/openerp/api.py", line 232, in wrapper
    return old_api(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/models.py", line 4721, in _search
    query = self._where_calc(cr, user, args, context=context)
  File "/usr/lib/python2.7/dist-packages/openerp/api.py", line 232, in wrapper
    return old_api(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/openerp/models.py", line 4505, in _where_calc
    e = expression.expression(cr, user, domain, self, context)
  File "/usr/lib/python2.7/dist-packages/openerp/osv/expression.py", line 639, in __init__
    self.parse(cr, uid, context=context)
  File "/usr/lib/python2.7/dist-packages/openerp/osv/expression.py", line 833, in parse
    raise ValueError("Invalid field %r in leaf %r" % (left, str(leaf)))
ValueError: Invalid field 'company_id' in leaf "<osv.ExtendedLeaf: ('company_id', '!=', False) on res_currency (ctx: )>"
 


The strange fact is that the module seems to be installed well, since I can configure the automated schedule update options.... it seems something got broken... any help? Thanks !!