After adding an iphone to my list, I have tried syncing my MobileMe account. Shortly after hitting the sync button I am asked for a Powerbook G4 password. Problem is I retired the machine several years ago and I still use the same password which continues to get rejected. I just spent over an hour with Apples online chat and they recommended that I call technical support. The diagnosis was a damaged keychain file. Has anyone experienced a fix for this?