I have a pair of glycerin and a pair of defiance that have the front rubber lip peeling off. On my first pair I had just switched to a mid-forefoot strike from heel striking and just figured that I had really worn them into the ground. I moved to a nike motos for a few hundred miles with no problems and then picked up the defiance. I\'ve had the defiance maybe a month and yesterday I noticed the same damn front lip peeling off. (both on the right foot) Has anyone else had a problem with this or is this something I\'m doing? I\'ve got decent knee lift, and I can\'t imagine I\'m dragging my foot or anything, but then it\'s both on the right foot... anyone?