OK,
I have a partial fix for this at
http://www.wcscomputers.co.uk/fetish.zip
download and put in your fetish nightfall dir.
WARNING.............
I am not a UI builder. You will still be told that it is out of date and when you click on ok, then press I it will bring up the inventory.
Yes I know it's crap, but so is the default UI.
will help until a patch comes out
Regards