1) What (objectively) is PHEX allegedly doing to mess up the Gnutella network? Is it really behavior that needs to be corrected to bring it into compliance with Gnutella 0.4?

2) I am beginning to write my own client (which will be a plug-in to a front end which I'm designing). Is there somewhere I can go with technical questions about the "Bearshare trailer" to the QueryHit descriptor, how clients identify each other (I don't see it in the 0.4 spec anywhere!) and stuff like that?