Since I upgraded to OS X 10.8.2 I can't login to iMessages or Facetime. When I go in my settings to login I enter my Apple ID and my password (100% it's the right one, I still purchase apps on the App Store with it) and then it acts as if it logged in, but everything is greyed out and there's a little grey spinning animation, then it asks for my password "Please enter your password for firstname.lastname@example.org", I enter it, wait 5 seconds, and it asks again and again and after 3 times it says "Could not sign in to iMessage" "The credentials of the registering device have expired". It seems to me that the problem started appearing when I updated to 10.8.2, but now I restored from a 10.8.1 Time Machine backup and it still does the same thing. (Updated back to 10.8.2 since then) Also, I created a new account to try to login to iMessage with it and it did work. This is extremely annoying since I just got my first iPhone (an iPhone 5) on friday and now I can't make it work with my computer the way Apple wanted it to work Also, once or twice (?) a day I get a message saying "com.apple.dock.extra quit unexpectedly" Here's the log of that crash message Anyone knows what the problem might be? Thanks!