Has something been changed recently around the clothing pieces or the HAK used on the server?
At first the player Jeebs had this problem, but now it seems I do. 95% of robe pieces are invisible.
Here is a screenshot of the default NWN robe that was fine before, but now:
No NWN files have been changed since I last logged in and things were fine.
Re-logging or restarting does not assist.
Happening across items and characters, including other player characters viewed from my end.
Edit: Cloaks are invisible also.
I have updated my Nvidia Video Card drivers recently. They're now sitting on version 387.92 on a GTX 980.