Summary: GCC 4.1 itself appears to be very stable, both on MIPS and AMD64. There are, however, a large number of packages using code (especially C++) which GCC 4.1 treats as errors. Fortunately, most of them are trivial to fix. By compiling about 6200 packages, over 500 new bugs have been discovered and submitted, 280 of which are specific to the increased strictness of GCC 4.1. Patches for 2/3 of those GCC 4.1 specific bugs have been submitted.
Complete email at http://lists.debian.org/debian-gcc/2006/03/msg00405.html
