swing arm problem?

[buymore]

I just now noticed today that my swing arm on the chain side has a "dent" on the underside up near the front? As observant as I am...it could have been there since I got it? I have not ridden off road at all, I have not hit any big chuckholes or anything and needless to say, I cant figure out how it would dent on the underside anyways? I though, maybe when it was removed fromt ehcrate for assembly, the swingarm fell down hard against the bottom and did it, but still....? It doesn't appear to have changed the angle of the arm or anything, just an unsightly dent that looks more and more unsightly everytime I look at it now! Will it be a problem? Has anyone ever changed one of these out? Has anyone ever had this happen to them so I may know how it happened? Any help at all appreciated. Thanks