I solved some of the many Mavericks problems reinstalling OSX from the first step.
Turn on the Mac holding option(alt) button pressed, then you choose to install again the OS.
. Now Mail seems to run like before.
My message aren't rejected by subdirectories.
. I can open Contacts with new graphics, but I have problem with two different lists of Exchange contacts,
the password erase itself after written down in System Preferences/Internet Contacts.
Don't know what to do.
I have exclamation point beside the two lists with error like this:
The operation couldn’t be completed. (SOAPWebServicesErrorDomain error -997.)
. App Store run again
. Still have problem with both Numbers and Pages....they crash immediately after a blinking window flash.
Now I try to install again these two.