Не запускаются программы список:
-k3b
-kmail
и другие
Выходит ошибка:
-unnamed app(5370): KUniqueApplication: Pipe closed unexpectedly.
Баг открыт на багзиле тут:
https://bugs.gentoo.org/show_bug.cgi?id=579546
Временное решение:
Yes, but dbus doesn't seem to be the (main) culprit here, so e-emerging is not even necessary. To get an immediate fix, use Egor's

1. prelink -u /usr/lib64/libdbusmenu-qt.so.*

To get a more permanent fix, use Alexander's

1. echo '-b /usr/lib64/libdbusmenu-qt.so*' >> /etc/prelink.conf.d/dbus.conf

I can confirm the former works; the latter is just making this permanent, i.e., meaning that the next (daily) prelink run will not mess things up again.