...I've never seen him quite like this before. No idea what caused it, or if it's fixable, or even if it's worth bothering about, but I figured I might as well report it, for sake of completion.

For those too lazy to view the screenshot, Sugriam Clickle is basically asking himself if he might view his goods. And responding. Poor sod can't have sold much that particular day.

If an invisible PC speaks to an NPC, and you are watching the scene and NOT seeing the translucent image of the PC, it will return the lines that the PC is supposed to say from the NPC. So basically, what has happened: An invisible PC spoke to Sugriam. How he can trade with them, I have no clue. Maybe he has true seeing.. ?

Ach so. Right, go ahead and lock this thread, then, I had no idea. :)