http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38342
--- Comment #10 from Bill Westfield <westfw at yahoo dot com> 2011-07-05 00:22:58 UTC --- I was using documented avr-libc features. Does that mean that this is an avr-libc bug rather than a gcc bug? Neither of the web pages you reference mention "progmem" or even AVR at all...