Mavericks, Mail 7.0, iCloud account problem

Question

Upgraded to Mavericks, now iCloud mail is off line.  Problem with iCloud account.  It looks like it cannot save the password.
Any ideas how to fix this??
If I send out an email, it will ask for my password and then work fine.  If I close and reopen the problem reutrns.
I do not have this problem with my MBA. Upgrade went fine, all mail accounts work.
I found the answer!!
Mail = Pref= Accounts = Advance = Pull down menu - chnage auth: from password to Apple token.

Answer 1

I've been having this same problem. It seems to occure in both Mail app and Text Edit.
When I have a body of text, and I try to select a part of it, or click to set my cursor somewhere in it, the new text that I begin to type suddenly appears down the row somewhere else -- obviously where I had no intention of typing it.
Another issue that sprung up at the same time as this, was that Mail app will not automatically attach a signature file to my mail anymore. It always has to be manually selected from the pull-down in the new message window.
Both of these issus began immediately when I upgraded to Mavericks, and have even transferred over to a brand new computer when the user account was migrated over.