I can't download any program to the arduino ethernet using a ftdi-board (sparkfun ftdi board) using the board.txt file from http://arduino.cc/en/Main/ArduinoBoardEthernet (http://arduino.cc/en/uploads/Main/boards.txt.zip).
I obtain a "Yikes! invalid device signature" error when download the program.
I'm using the 22 ide from the standard ubuntu repository for Ubuntu 11.10
If I change the upload.protocol in the board.txt file from stk500 to arduino everyting works ok
Bad line: ethernet.upload.protocol=stk500
Good line: ethernet.upload.protocol=arduino
IMHO Somebody should change the board.txt file