I did a fresh install of iOS 6 onto my iPhone 4S. I was able to sign in to gmail, iCoud, Twitter, Facebook, etc. However whenever I go to my 'Mail' app, I get the message "Password Missing Enter the password for the account "iCloud".". So i'll enter my iCloud password and the message will pop up again. If I click cancel, my mail will load and i'll be able to view it.. but once I'm done, the same message pops up, every time.
Attached screenshot of the message: View attachment 19000
Attached screenshot of the message: View attachment 19000