TG - I happen to agree with Knott on this. It doesn't make sense, especially if you are an overpornator. The foot exercises Knott suggested are great. I'd also second the Chakos and emphasize again the need to see someone to assess your running mechanics, including low back and hip flexibility and strength. If the foot stuff isn't working, chances are that you have a muscle imbalance around the hips and pelvis that is contributing to you putting too much pressure on the inner part of the foot. A quick test is to do a half squat and look at how your knee lines up with your foot. Is the center of your knee cap directly over your second toe or are you knees tending to buckle in. If you're buckiling in... you really need to have all that hip and back stuff checked out. There are soooooooo many mechanical facotrs invovled including abdomenal strength that I could never point them all out. Please go see a PT with running expertise, better yet one that does video analysis of gait.