Turns out (as I discover when I wasted hours blaming my circuit/code) that the latest package is broken. Alastair knew about it and had a patch. Here you can find the related source and binary (x86_64) files: http://members.iinet.net.au/~eyaleb/avr-gcc/ cheers -- Eyal Lebedinsky (eyal at eyal.emu.id.au)