I'm having issues with my cursor continuously jumping around. Diagonally up/left and down/right. This started yesterday. I have not made any changes to my system. I am using a MacPro running 10.6.8 and a Logitech MX Revolution wireless mouse. I tried unplugging the Logitech and tried a wired mouse. No difference still jumping around. I don't use any of the built-in wireless options. WiFi, Bluetooth are always off. (Just Logitech USB RF transceiver) I tried googling this issue but just kept getting info about trackpad issues. If anyone has any info or fixes for this it would be greatly appreciated.