I've been running iOS 5 sense the first beta and opened an iCloud account, and also had 10.7.2 installed. My iCloud account has been great.... until it finally came out! It logins fine in iOS, but on my mac not so much. I had to use the Reversioner on the 10.7.2 beta before I could install 10.7.2 final. Now I can't login in the iCloud section in system preferences, it displays "You can't sign in at this time". Help??