I have a Logitech optical wheel mouse. Whether the mouse sensitivity was low or high, the sight on my weapon floated around, and I could never zero in on someone. I have played numerous 1st person shooters with this mouse and not had a problem. I have a high end machine in all respects. What do you think gives?? I don't see anyone else with the same complaint, so it must be something instrinsic to my machine, mouse, or their relationship to the software. The game looked great, but I quit playing because it frustrated me that the thing I enjoy most in these kinds of games, sniper zoom shoot, was not a performable option because of my inability to lock onto any target without floating away. Please give me any of your thoughts about how to fix this problem.