Forgive the poor attempt at humour but that must rate as one of the most obscure question we've had in the forums. It sounds like something from "Allo Allo".
Joking aside, we will need a little more to go on. I've no idea what a "pinned" div is but it sounds as though you could mean "fixed positioned" but either way we will need some code to go with that. Post the css and html that explains the problem you are having or post a link if available and I'm sure that we can give more help than my silly joke.:)
Also add any instructions on how to reproduce the problem if it is not immediately obvious from the code/link you present..