I know there have been posts about this previously, but I wanted to hear from people who have had this issue before and their experience with Nike. I have had these shoes since the middle of May, almost four months, I believe. I got them directly from Nike.com. The soles themselves are doing just fine, but I am starting to get cracks on both shoes near the middle plastic piece (not sure of the name of the piece). Check out the pictures: When does the cracking warrant a service call to Nike and maybe a replacement pair of shoes? As my warranty gets closer to its expiration, I would just like to know my options. :???: Thanks guys! Cheers!