I had the same problems as you guys have.
To solve the problem, I crated backup of all my files, concatcs etc.
To solve the problems do those few steps:
1. Backup all your content, contacts, files etc
2. Disconnect you phone from PC
3. Uninstall the Kies
4. Format your phone
5. Install the Kies again
6. Restart your phone
7. Finaly, connect your phone to Kies, all problems should be solved now.