I've had my MT's for a week, have been walking in them about every other day 2-3 miles/day (in front of the TV w/Leslie Sansone workouts). On Sunday, for the first time, I wore them for a 2-mile outdoor walk and came home with raw places on the back of my heels where the shoe rubbed right thru my socks.

Is this part of the break-in process? Is anyone else having issues with the shoes rubbing? Any suggestions?