Stefan:
I'm having a problem using this shield with your toolbox code.
Everything builds fine and starts up well. I get an initial sign on message to display on the LCD and can read the buttons fine. My app periodically writes new data to the LCD (about every 3 seconds or so). At random, the LCD/buttons stop working. My app continues to run fine, but when I attempt to write to the LCD or read the state of the buttons, nothing on the shield works.
I suspect a problem with the I2C interface (the only way to recover from this is to power down the board).
Any thoughts?
Kelly