I purchased the MX Revolution mouse a few months ago after the entusiastic 5 star rating at Mac World. The mouse is great but about 40% of the time when I attach and then disconnect a usb flashdrive or USB Compact Flash reader from my Mac Pro I find that the keyboard has frozen.

To get it unfrozen requires unplugging the little USB Logitech wireless connector and then plugging it in again after which it works fine again until the next time I use the USB ports.

The cure for the problem is the $20 shareware program USB Overdrive. Since I got rid of the Logitech drivers and installed Overdrive there are no more problems.

You'd think that since Logitech apparently doesn't possess the ability to write useful drivers for Macintosh computers they could perhaps license Overdrive and provide it with the mouse.