I recall there was something about this, but I don't remeber the details. I think it was either:
A) Can't use innocence scrolls if the item have a nebulite slot.
B) Can't use innocence scrolls if the item have a nebulite mounted.
There is a thread on Basil that claims the scrolls work even on an item with a mounted neb, but I thought I'd see if anyone here have any experience with it.
Thanks for helping out!