It seems like Galleon isn't getting announced by detection from chat messages and nameplates. It's only announced by mouseover.. Chat detection is enabled. Nalak and Sha of Anger are annouced by chat messages. I'm including my config file in the attachment.
SilverDragon.zip

Here is the debug log:
OnChatMessage, CHAT_MSG_MONSTER_YELL, Loot and pillage, bwahahaha!, Chief Salyis, nil, nil
OnChatMessage, CHAT_MSG_MONSTER_YELL, Bring me their corpses!, Chief Salyis, nil, nil
OnChatMessage, CHAT_MSG_MONSTER_YELL, Retreat to the hills!, Chief Salyis, nil, nil

Issue here is that Galleon is being announced by someone who isn't Galleon. For that matter, it's being announced by someone who's not even rare. I'll have to add some sort of mapping for this...

Let me know if that works for you?

It works, thanks!