I take it you bought it too long ago for it to still be under warranty by the store?
A friend of mine did a little bit of a bad thing to get his Intellimouse replaced.....it stopped working after 6 months, so he went to the store, bought another one, put the non-functioning one in the box, and took it back, and told them the one that he got doesn't work, and that he wants his money back.
Neway, I wouldn't do that myself, but I guess it could work if you do it right....
`Carrie