As seen in bug https://bugs.gentoo.org/show_bug.cgi?id=270351 there is a glibc compatibility issue fixed in this version of the package. Please, be so kind to fix ASAP.
bsd doesn't do stable keywbords.
x86 stable
+ 11 Jul 2009; <chainsaw@gentoo.org> netpbm-10.46.00.ebuild: + Marked stable on AMD64 for bug #277184; tested on a dual Opteron 2354. + Restores compatibility with recent glibc versions.
Stable on alpha.
Stable for HPPA.
ppc stable
ppc64 done
ia64/sparc stable, closing