After playing around a bit, I found out that when reverting to a version of yelp that worked before, the same crash appears. But when gnome-vfs2 is reverted to previous version (that means 2.17.91) , even yelp 2.18.0 starts fine. Maybe it is not a yelp issue (see Bug #91882 on gnome- vfs2)?
-- [apport] yelp crashed with SIGSEGV on first start in fresh install https://launchpad.net/bugs/91716 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
