pert:
Which filenames?
The page mentions "arduino-usbserial/Arduino-usbserial-uno.hex" and "arduino-usbserial/Arduino-usbserial-mega.hex". Are these for the ATmega8U2 specifically? What's the difference between these and "Arduino-usbserial-atmega16u2-Uno-Rev3.hex" and "Arduino-usbserial-atmega16u2-Mega2560-Rev3.hex"?