I have been running in my fivefingers for almost a year now and love them, however I have developed a ongoing bruise on my left foot. The second toe joint at the ball is very sore and hard to run in. Has anyone had this happen, and what did they do about it? I am thinking about going back to a padded shoe, but dont want to. I have also recently bruised the hell out of my left heel b/c of the ball pain. Thanks for any advice!