I don't know where else to post this, so I am posting it here. I have recently been having problems with left and middle clicks not being picked up by OS X. For example, I click a link, but its not selected at all. Another is I middle-click a tab in FF to close it, and nothing happens. I usually have to click twice in succession or hold the button down for a second or teo for the click to register. The weirder part is that it doesn't always happen. The right button and back/forward buttons on my mouse don't seem to be affected. I've tried to clean my mouse (Logitech MX518) but that doesn't fix the problem. The only thing I can think that is causing the problem is mouse drive I am using (USB Overdrive). I have to use it as Logitech hasn't and won't release drivers for the MX518 for the Mac. A bit of research shows that a few people have had similar issues. Has anyone here run into this problem before? Know of a solution? If not, do you guys know of any alternatives to USB Overdrive that I can use that works with 10.6.x?