survey module not working in V6.1

[patvad]

openerp version 6.1-dev
plateform : Ubuntu 11.04

When i try to use or modify a survey i receive the following error.

Environment Information :
System : Linux-2.6.38-11-generic-pae-i686-with-Ubuntu-11.04-natty
OS Name : posix
Distributor ID: Ubuntu
Description: Ubuntu 11.04
Release: 11.04
Codename: natty
Operating System Release : 2.6.38-11-generic-pae
Operating System Version : #50-Ubuntu SMP Mon Sep 12 22:21:04 UTC 2011
Operating System Architecture : 32bit
Operating System Locale : en_US.UTF8
Python Version : 2.7.1+
OpenERP-Client Version : 6.1-dev
Last revision No. & ID :1961 <email address hidden>
Traceback (most recent call last):
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/wsgi.py", line 71, in xmlrpc_return
    result = openerp.netsvc.dispatch_rpc(service, method, params)
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/netsvc.py", line 328, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/service/web_services.py", line 568, in dispatch
    res = fn(db, uid, *params)
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/osv/osv.py", line 116, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/osv/osv.py", line 170, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/osv/osv.py", line 161, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/osv/orm.py", line 3197, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/osv/orm.py", line 3256, in _read_flat
    cr.execute(query, (tuple(sub_ids),))
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/sql_db.py", line 153, in wrapper
    return f(self, *args, **kwargs)
  File "/home/openerp/pv_repo/oerp_61/openerp/server/openerp/sql_db.py", line 215, in execute
    res = self._obj.execute(query, params)
ProgrammingError: operator does not exist: integer = boolean
LINE 1: ...survey_question_wiz" WHERE survey_question_wiz.id IN (true) ...
                                                             ^
HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.