I got my Logitech S530 today and so far I love it, except of course there's the ever-present hated OS X mouse acceleration. In my previous setup, I was just using an MX1000 with the Apple keyboard, and USB Overdrive to fix the acceleration problem. Well, as I've discovered, once you install the Logitech Control Center, USB Overdrive ceases to work. To use USB overdrive, I have to remove the LCC -- but then I won't be able to use all the media buttons (play/pause, volume, etc) on my S530 keyboard. Does anyone know of a way to still have these media keys function AND disable the craptastic OS X mouse acceleration? I'm growing infuriated with my iMac just because of the mouse movement. It's driving me batty.