I went to a running store this weekend and they videotaped me running on a treadmill... turns out that I am an "overpronator":

http://www.runnersworld.com/article/0,7120,s6-240-319-327-7727-0,00.html

In other words, I roll my foot inward more than 15% with each step. Oops. Anyway they sold me some shoes that should hopefully fix that...

Anyone else over or underpronoate when they run or jog? Did you have any luck addressing this with a new shoe? Or did you find a way to adjust the root cause, and change how you run...