From: Casey Duncan [mailto:cduncan@kaivo.com]

The problem is that you are subclassing SimpleItem.Item and ObjectManager which are incompatible base classes. SimpleItem.Item defines its own objectIds method which *always* returns and empty tuple (because it is not a container). You should be able to safely loose this base class and all will be right with the world.

Saved my day and restored my faith ... thanks Max M