The USB description for my Logitech Cordless Optical Mouse isn't right. It's usb ID (Vendor=046d ProdID=c501) maps to "Cordless Trackball" in usb.ids. I'm not sure what the ProdID for the Cordless Trackball actually is because I don't have one. Can we change the line in usb.ids to be: c501 Cordless Optical Mouse instead of: c501 Cordless Trackball
Will be fixed in 0.7-1.