Greetings, I utilize deep cloning for an object by serializing the object to a memory stream and the de-serializing it back again. I noticed that the clone I obtain from this process has the same ObjectId GUID value as the original object. My worry is that having two clones with the same objectId might have hidden traps in the way LLBL handles entities and entityCollections?

VERY good point, though hard to fix... as it's done through object deserialization, and in there the objectid has to be included, to be able to identify an object in a remoting scenario for example.