I recently bought a DeathAdder 3.5G and it is acting very strange. I use the mouse on my iMac OS 10.6.8. Sometimes when I mouse over a button, or a link, or anything that is clickable the cursor will zig-zag around it as if something else is moving the mouse away. It fells like trying to touch similar poles of magnets together. They push each other away it seems. I have installed the drivers and everything. Help would be Appreciated. Thanks.