Michael, could you try the patch at the upstream bugreport (comment #9) on a plain seahorse 0.9.3? I don't have access to an amd64 right now...
http://bugzilla.gnome.org/show_bug.cgi?id=352808 -- [Edgy] seahorse crashed at startup (segmentation fault) https://launchpad.net/bugs/57433 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs