I have the same problem. Here is the debug output from seahorse-tool after following Andreas Moog's steps.
** Attachment added: "gdb-seahorse-tool.txt" http://launchpadlibrarian.net/17777732/gdb-seahorse-tool.txt -- seahorse-tool crashes when trying to verify signatures https://bugs.launchpad.net/bugs/227493 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to seahorse in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs