I was exploring and found a Scriptorium and wanted to echange a recipie of mine. I have "Bueprints: Inn" in my inventory but nontheless cannot exchange at the Scriptorium and allways get the message:

You've found Scriptorium!

The old archivist enthusiastically welcomes you and asks if you would like to enrich the scriptorium collection with the scrolls that you have. In exchange for enriching the scriptorium he offers you a copy he has made of another recipe.

You don't have any recipes to perform exchange.

Normaly I should be able to look what the scriptorium offers and decide if I wanna exchange or not.

This happens when the only thing you have is the same as what the Scriptorium wants to offer you, it was changed to stop a bug where you'd lose both prints if you tried to exchange for the same thing.

Like happened here: http://beastkeeper.com/thread/1358

I just came here to report the same "bug". I was able to switch scrolls earlier today, so I'm hoping I just unwittingly ran into a Scriptorium handing out the same scroll I already have.