i upgraded to kde 4.4 and every time on boot k-migration tool is started and performs address-book migration. is there a way to disable it?

See here http://techbase.kde.org/Projects/PIM/Ak ... amework.3F

However, if it starts every time you login, it means it fails every time which in turn suggests a deeper problem (Akonadi not starting, etc).

Cheers,
_

This is going to become very important, so it's best to sort out any problems as soon as possible. Start by reading http://userbase.kde.org/Akonadi to see if any of those issues are present in your system.