My Logitech S530 mouse has been working fine for over a year but has recently started to act weird. When I click on an email to drag to a folder it instantly opens it (as if single click is set to double click), and when I try to drag files it drops them half way and picks up whatever else is under it at the time - very annoying. Not sure if this is a conflict with OS X 10.4.9 software update. Is anyone else experiencing similar things? My Mac mouse works fine. I've uninstalled the Logitech drivers and updated to the latest ones from Logitech, but nothing changes. Any ideas out there?