Aha, so that's why all my stuff disappeared then. I tried this on my own site to see what would happen, and get -100 karma and all the items that I had, (including our collectibles collections) disappeared from my inventory.
Guess I better read the whole thread before I try any more of these items. Actually I'd like to get this without the removing all the item from the users inventory as we have some things that should not be removed from the inventory. Any chance of getting that version?