These are the pedals...
http://www.nashbar.com/bikes/Product...2_10000_200435

Recently, I noticed that my drive side pedal was a little off.

There's a small gap on the underside of the pedal, which I showed in the picture with the red lines. The gap should be even throughout, but there's a bigger gap on the outside.

I've tested the pedal and I've actually ridden maybe a hundred or two miles on it like that, and I haven't noticed anything different about the pedal.

Any ideas how to fix it, or what the problem might be?