Most likely, this is just a result of drilling into the property. There are lots of circular references in unity properties, e.g., MonoBehaviors have a reference to the gameObject that owns them; so for example if you drill into guiText you can find gameObject, which has a guiText, which has a gameObject etc.
But it's possible something else is going on. I'll double check that nothing funky is happening... And maybe try to catch these circular references and not display them...