[7.0] "TypeError: 'NoneType' object is not iterable" when upload (filezilla) a second file

[Tomás Pascual]

In a clear installation on Ubuntu 12.4.3 and after install just project, knowledge managment and crm modules, whwn I try to upload a second file, ftp server is dead.
Always, first file uploaded, rus well.

2013-09-22 10:11:05,842 740 ERROR alcalaing openerp.addons.document_ftp.ftpserver: Traceback (most recent call last):
  File "/usr/lib/python2.7/asyncore.py", line 83, in read
    obj.handle_read_event()
  File "/usr/lib/python2.7/asyncore.py", line 444, in handle_read_event
    self.handle_read()
  File "/usr/lib/pymodules/python2.7/openerp/addons/document_ftp/ftpserver/ftpserver.py", line 657, in handle_read
    chunk = self.recv(self.ac_in_buffer_size)
  File "/usr/lib/python2.7/asyncore.py", line 388, in recv
    self.handle_close()
  File "/usr/lib/pymodules/python2.7/openerp/addons/document_ftp/ftpserver/ftpserver.py", line 795, in handle_close
    self.close()
  File "/usr/lib/pymodules/python2.7/openerp/addons/document_ftp/ftpserver/ftpserver.py", line 801, in close
    self.file_obj.close()
  File "/usr/lib/pymodules/python2.7/openerp/addons/document/document.py", line 2111, in close
    registry.get('ir.attachment').write(cr, 1, par.file_id, {'datas': data})
  File "/usr/lib/pymodules/python2.7/openerp/addons/base_calendar/crm_meeting.py", line 160, in write
    return super(ir_attachment, self).write(cr, uid, ids, vals, context=context)
  File "/usr/lib/pymodules/python2.7/openerp/addons/document/document.py", line 132, in write
    return super(document_file, self).write(cr, uid, ids, vals, context)
  File "/usr/lib/pymodules/python2.7/openerp/addons/base/ir/ir_attachment.py", line 268, in write
    self.check(cr, uid, ids, 'write', context=context, values=vals)
  File "/usr/lib/pymodules/python2.7/openerp/addons/document/document.py", line 78, in check
    cr.execute('SELECT DISTINCT parent_id from ir_attachment WHERE id in %s AND parent_id is not NULL', (tuple(ids),))
TypeError: 'long' object is not iterable