Hello,
I have no details yet for reproducing, but there seems to be a rendering problem with some mesh where part of the mesh is alphaed. In this case it's something like a jacket where 80% of the sleeves and the collar should be not visible.
Alas, Cool VL Viewer and Black Dragon Viewer seems to show the stuff, but Firestorm does not.
I am trying to get a copy of the item so I can reproduce it. Just wanted to mention it already, maybe someone has seen this, too.
See the attached photo. All the white parts should be invisible (sleeves, collar):