| NPCs with orange text mean they have a dialog, hwoever you may not have the requirements to see it.
For example, the stableboy has a dialog which is part of a quest the master sarg will give you. But you can't access that dialog on an interaction (dbl click in range) unless you are on that quest.
How you got empty dialog boxes is something i'd like to know more about, were you using the /interact command directly? And on which npcs and durign which quest. |