Mighty Mouse Scratch Sound (video&picture to demonstrate)

Video describing the problem.http://video.google.com/videoplay?do...50966223&hl=en
Picture: http://xs.to/xs.php?h=xs123&d=08042&f=img_0404516.jpg of the area on the glide-padded area that appears to be worn down

Basically the mouse started making this really scratchy sound from underneath when moved about on my steelpad. I havn't had the problem with previous mice.

The mouse is 3 weeks old got it 24th december.

I need feedback whether or not i should return it

thanks in advance..