Update bugs: doesnt existe column res_partner.tz_offset

Hi,

I'm testing openerp 6.2. I found a bug when upgrade the server with the latest nightly release. If exist a database before the release of the server, i receive this message:

Server Traceback (most recent call last):
  File "/opt/openerp/server/openerp/addons/web/session.py", line 91, in send
    return openerp.netsvc.dispatch_rpc(service_name, method, args)
  File "/opt/openerp/server/openerp/netsvc.py", line 361, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/opt/openerp/server/openerp/service/web_services.py", line 601, in dispatch
    res = fn(db, uid, *params)
  File "/opt/openerp/server/openerp/osv/osv.py", line 167, in execute_kw
    return self.execute(db, uid, obj, method, *args, **kw or {})
  File "/opt/openerp/server/openerp/osv/osv.py", line 121, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/opt/openerp/server/openerp/osv/osv.py", line 176, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/opt/openerp/server/openerp/osv/osv.py", line 164, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/opt/openerp/server/openerp/addons/base/res/res_users.py", line 351, in context_get
    res = getattr(user,k) or False
  File "/opt/openerp/server/openerp/osv/orm.py", line 485, in __getattr__
    return self[name]
  File "/opt/openerp/server/openerp/osv/orm.py", line 400, in __getitem__
    field_values = self._table.read(self._cr, self._uid, ids, field_names, context=self._context, load="_classic_write")
  File "/opt/openerp/server/openerp/addons/base/res/res_users.py", line 796, in read
    res = super(users_view, self).read(cr, uid, ids, fields, context=context, load=load)
  File "/opt/openerp/server/openerp/addons/base/res/res_users.py", line 272, in read
    result = super(res_users, self).read(cr, uid, ids, fields=fields, context=context, load=load)
  File "/opt/openerp/server/openerp/osv/orm.py", line 3558, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/opt/openerp/server/openerp/osv/orm.py", line 3633, in _read_flat
    res2 = self.pool.get(table).read(cr, user, [x[col] for x in res], cols, context, load)
  File "/opt/openerp/server/openerp/osv/orm.py", line 3558, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/opt/openerp/server/openerp/osv/orm.py", line 3610, in _read_flat
    cr.execute(query, [tuple(sub_ids)] + rule_params)
  File "/opt/openerp/server/openerp/sql_db.py", line 162, in wrapper
    return f(self, *args, **kwargs)
  File "/opt/openerp/server/openerp/sql_db.py", line 227, in execute
    res = self._obj.execute(query, params)
ProgrammingError: no existe la columna res_partner.tz_offset
LÍNEA 1: ...s_partner."signup_token",res_partner."country_id",res_partne...

I'm reading about this issue, and it's probabily a error on postgres or configuration, but dont know how to correct this.

Any helps will be appreciated!