I have noticed this after recent `emerge-ac`: !!! existing preserved libs: >>> package: media-libs/libpng-1.2.51 * - /usr/lib32/libpng12.so.0 * used by /opt/tsmuxer/bin/tsMuxerGUI (media-video/tsmuxer-1.10.6-r1) Use emerge @preserved-rebuild to rebuild packages using these libraries Remerging tsmuxer doesn't help as it seems it really needs libpng12.so. Reproducible: Always
There is easy workaround: emerge -C tsmuxer && emerge tsmuxer So probably this bug can be closed...?
I've just checked the installed files myself, and with USE=qt4 it indeed requires libpng:1.2. + 16 Jun 2014; Michał Górny <mgorny@gentoo.org> tsmuxer-1.10.6-r1.ebuild: + Add missing dependencies on multilib libpng:1.2 and zlib, bug #512174.