Traceback (innermost last):
  Module ZPublisher.Publish, line 121, in publish
  Module Zope2.App.startup, line 240, in commit
  Module transaction._manager, line 96, in commit
  Module transaction._transaction, line 380, in commit
  Module transaction._transaction, line 378, in commit
  Module transaction._transaction, line 433, in _commitResources
  Module ZODB.Connection, line 484, in commit
  Module ZODB.Connection, line 526, in _commit
  Module ZODB.Connection, line 553, in _store_objects
  Module ZODB.serialize, line 407, in serialize
TypeError: Can't pickle objects in acquisition wrappers.