Hi guys. A year ago my father took home a 1.1 randomly from work, saying they were going to throw them away. The mouse is really responsive and all, but it has this very strange problem which I don't know if i can explain..

It's really responsiv from left to right and vice versa, but if I drag it to the, lets say upper left, It just feels strange and un-responsive. Since it's been at their work for so long I've started to think that the mouse might be broken somehow. But before I purchase a new one, I'm simply wondering if this is how the mouse is suppose to react/feel.

It's like It got prediction on, which I know it doesn't. Any clarification would be appreciated.

On a side note, Is there any difference between http://www.maxfps.se/product_view.aspx?productid=210 and http://www.maxfps.se/product_view.aspx?productid=213 exept for the side-buttons?