This also applies to login via Facebook Connect. They change the rules on this sometimes, and don't give much warning beyond a post on their dev blog. Guess wh

This also applies to login via Facebook Connect. They change the rules on this sometimes, and don't give much warning beyond a post on their dev blog. Guess who your users blame when all of a sudden they can't log into your site anymore with their Facebook account? We user RPX/Janrain to deal with this, but we still get burned sometimes nonetheless.