Hello there, I bought a magic mouse about 2 weeks ago to remplace my long Microsoft Wireless mouse 2000. I like the features on the magicmouse but there seems to be some kind of lag and variable speeds when moving around. It's pretty annoying. Is this normal?? Is the bluetooth slower than the usb? What mouse do you recommand me that work fines with OSX that is not the magic mouse if my problem can't be solved. Thank you very much.