I reported this as a bug yesterday while online.
Someone sent an item - holiday wreath - to me and I accepted it into my inventory.
I rezzed it and it appeared - voila! - and there was still a copy in my inventory.
when I took it back into my inventory, the new copy had no copy, no modify permissions but the original didn't.
I made several copies from the original but could not from the copies.
This is clearly a bug and any new item into inventory seems to be able to copy this way if given to you.
Anyone else notice this?