Currently using a Logitech VX mouse on my MacBook Pro C2D 2.33GHz, at the moment it's practically unusable. The lag is stupid, clicking to open something turns into a 10 click challenge. The mouse stutters around the screen. This happens often, sometimes it works great but at the moment, i'm very tempted to get a Mighty Mouse, since it really is annoying me. I'm not using any software, simply plug and play. Has anyone experienced this? If so, any fix?