No reported bugs for it, and it should fix some bugs we currently have open.
Any chance you can incorporate the patch included in bug 281040 into 4.3.4 for stabilization? I've been trying to get it done for quite some time, and gcc developer Uros Bizjak already committed it to master, 4.4.x, and 4.3.x branches, which required him to run full regression tests.
x86 stable
amd64 stable (tested by building 900 pkgs, world)
Updating to gcc 4.3.4 make some packages broken, bug 289492
Please look at this: grep libdir /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.4/*.la /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.4/libgfortranbegin.la:libdir='/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.4' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.4/libgfortran.la:libdir='/usr/lib/../lib64' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.4/libgomp.la:libdir='/usr/lib/../lib64' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.4/libmudflap.la:libdir='/usr/lib/../lib64' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.4/libmudflapth.la:libdir='/usr/lib/../lib64' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.4/libsupc++.la:libdir='/usr/lib/../lib64' grep libdir /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.2/*.la /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.2/libgfortranbegin.la:libdir='/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.2/libgfortran.la:libdir='/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.2/libgomp.la:libdir='/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.2/libmudflap.la:libdir='/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.2/libmudflapth.la:libdir='/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2' /usr/lib64/gcc/x86_64-pc-linux-gnu/4.3.2/libsupc++.la:libdir='/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2'
disregard comments #4 and #5. fixed in bug #283761 some time ago.
that's bug #283761 and it's not specific to 4.3.4. if you rebuild gcc it should work again.
ppc stable
Stable on alpha.
arm stable
ia64/s390/sparc stable, sh soon.
ppc64 done
sh stable, and mips doesn't do stable keywords, closing