I was away from the game since January. Came back on, downloaded two patches, and then ran into a weird problem. If I use a rifle, normally the mouse wheel changes the range settings. However, the minute I click it down one or up one, it is stuck in change mode and starts cycling uncontrollably through all the range settings. I can't stop it. Even if I switch to another weapon and then come back, the uncontrollable range cycle picks up where it left off. I have switched mice (different manufacturers), same problem. The mouse wheel does not misbehave in other applications. System: iMac OSX, Logitech or Microsoft wireless mice. Any thoughts?