Further hinting at an imminent release of OS X Lion, Apple today released an update to Migration Assistant for users of Mac OS X Snow Leopard. The update corrects a problem that could prevent users from transferring data from a machine running Snow Leopard to a new one running Lion.
The upgrade is rather small, only clocking in at 312KB and doesn't require a restart.This update addresses an issue with the Migration Assistant application in Mac OS X Snow Leopard that prevents transfer of your personal data, settings, and compatible applications from a Mac running Mac OS X Snow Leopard to a new Mac running Mac OS X Lion.
Article Link: Apple Releases Migration Assistant Update for OS X Lion Transition