Google's petition describes it pretty understandably; see section "A. This Court Should Grant Review To Decide Whether Copyright Protection Extends To A Softwar

Google's petition describes it pretty understandably; see section "A. This Court Should Grant Review To Decide Whether Copyright Protection Extends To A Software Interface" beginning on page 11 of the PDF (http://services.google.com/fh/files/blogs/googlepetition.pdf http://services.google.com/fh/files/blogs/googlepetition.pdf).