What do you mean with 'item interaction'?

my guess: the interaction with items <img src="/ubbthreads/images/graemlins/tongue.gif" alt="" />
no, i think using and manipulating objects should say the same, IF the things that you can do with stay the same. like you have games where you have like 20 things you can do with the object, but in DD its easy:
click on it-> use it/pick it up/....
dragging it->placing it somewhere else/combine items

altough i sometimes had some problems using the teleporterstone. i wanted to put it in my inventory but accidently used it, altough i dont know how you could change that.