From the newsgroup: player chatted with leader and was ejected for
not being high enough level, then when he came back later there was no
leader to be found, but there was a polymorph trap on quest home level.
This makes quest leaders and nemesis be aware of all trap types--rather
than just having leaders be aware of magic portals--so they'll be able to
avoid polymorph traps. It also makes chatting with a polymorphed leader
work as long as the new form is able to speak (use same criteria as with
poly'd shopkeepers: can't be in a form that's limited to animal sounds).