From libpng's homepage: libpng 1.5.14, fixes a bug in handling compressed iTXt (international text) Due to https://bugs.gentoo.org/show_bug.cgi?id=462312
skipping 1.5.14 to avoid bugging archteams too soon again please test and mark =media-libs/libpng-1.5.15 stable since it's the last version from 1.5 series in SLOT="0" to stabilize it's been in tree for a week+ now, so if you want to give it another week or two, that's fine, but notice now that ~arch has 1.6.* by default, it won't get anymore testing there (!)
Stable for HPPA.
amd64 stable
x86 stable
ppc stable
ppc64 stable
arm stable
alpha stable
ia64 stable
s390 stable
sparc stable
sh stable
M68K is not anymore a stable arch, removing it from the cc list