libbsd-0.5.2 is crashing in setproctitle on Fedora 19, this time with claws-mail by way of libnss. This may be due to the use of _dl_open() to load libnss_wins.so.2. I haven't had time to dig into this any further. I'm tempted to simply make setproctitle do nothing.
Here's the Fedora bug:
This should be fixed now in 0.6.0, with the constructor logic moved into a static library, sidestepping the whole issue. Please see the announcement for more details.