lutherbaker (1) [Avatar] Offline
I'm not sure how to do a quick search for Errata in WIA ... but I think this is one:

Second, the form extends StatelessForm . It's possible (although probably rare) for a user to go to the login screen, decide to do something else for an hour, then try to log in using that page of the now-expired session, and be confronted with a session-expired message. We avoid that situation by making the login form (and page) stateful so the login functionality is bookmarkable.

I think the higlighted word should be "stateless" and not "stateful".