Pan version 0.151, "Butcha", was released in late June. That should have
most of the fixes and be pretty stable (tho a quick look says there's more
than translations committed since then, but I'd say I've been stable since
about then or a bit earlier), but given distro release cycles and the fact
that (as a Gentooer) I don't know how current Slackware 15+current
actually is, I'd say 50/50 you're on something before that, and the fact
that you're still crashing increases the odds further, to I'd say 70/30
that you're running something without those bugfixes.