AVR-Chat

>
>Try read out the code from the working board and program that on the other
>two.

I'll try it, but I didn't touch that code since it was put in the working 
board.

>Also, another trap is that setting the wrong CPU type with the STK-500
>programmer,
>will NOT hold back programming or notify you in any way. Been there, tried
>that.

Not a problem, but a good suggestion..
Yes, I also love the helpful messages that tell you an ERROR has occurred.
Nothing USEFUL about debugging it, just that SOMETHING went wrong.