one2many problem

This problem is connected with the field current. ITis TinyDict but when ids is a list of tuple the field current is tranformed in a tuple so then we have the following error

openerp-web/addons/openerp/widgets/form/_o2m.py in __init__(self=O2M, **attrs={'context': {'bin_size': True, 'client': 'web', 'lang': u'it_IT', 'tz': False}, 'editable': True, 'link': 1, 'model': 'wizard.account.asset.compute', 'name': u'move_ids', 'nolabel': u'1', 'prefix': '', 'readonly': u'1', 'relation': u'account.move', 'required': False, ...})
  136
  137
  138 current.model = self.model
  139 current.id = id
  140 current.ids = ids
current = (1, 40L, {}), current.model undefined, self = O2M, self.model = u'account.move'

<type 'exceptions.AttributeError'>: 'tuple' object has no attribute 'model'
      args = ("'tuple' object has no attribute 'model'",)
      message = "'tuple' object has no attribute 'model'"