Whew, thanks for sharing that. I was going crazy because every number combo I tried it complained was too insecure. After a while I just gave up for fear of creating some PIN that I would forget and end up locking myself out of important aspects of my Apple ID.That is a bug. No matter what combination key code it will tell you it's weak. Set it up via iCloud panel in mavericks instead and it will let you choose whatever pin you want.