Apparently, my stamps won't load on the stamp screen, I've tried rescanning but that didn't work either. Is it because powder toy doesn't support old stamp from older versions? If so, how can I port it over to the newer version?
Copy all of the stamps to ~/LIbrary/Application Support/The Powder Toy/stamps/
sorry for moving the location suddenly without a way to move them automatically. OS X 10.9 broke loading stamps and preferences (well, turns out it didn't actually ...) so we had to move it all to a new location.