gksu crashed with SIGSEGV in g_closure_invoke()

Binary package hint: gksu

Got this crash report when running update-manager from the system menu. "Starting Administrative Application" showed up in the taskbar, with no dialog popping up to collect my password. Then, the crash report popped up. This is on an amd64 intrepid install of ubuntu on an Intel Core 2 duo. This is related to bug #275044 that I reported:

https://bugs.launchpad.net/ubuntu/+source/libgksu/+bug/275044

Description: Ubuntu intrepid (development branch)
Release: 8.10

gksu:
  Installed: 2.0.0-5ubuntu3
  Candidate: 2.0.0-5ubuntu3
  Version table:
 *** 2.0.0-5ubuntu3 0
        500 http://ubuntu.media.mit.edu intrepid/main Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
DistroRelease: Ubuntu 8.10
ExecutablePath: /usr/bin/gksu
NonfreeKernelModules: nvidia
Package: gksu 2.0.0-5ubuntu3
ProcAttrCurrent: unconfined
ProcCmdline: /usr/bin/gksu --desktop /usr/share/applications/update-manager.desktop -- /usr/sbin/synaptic --hide-main-window --non-interactive --parent-window-id 60817411 --update-at-startup
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: gksu
StacktraceTop:
 ?? () from /usr/lib/libgksu2.so.0
 ?? () from /usr/lib/libgksu2.so.0
 g_closure_invoke ()
 ?? () from /usr/lib/libgobject-2.0.so.0
 g_signal_emit_valist ()
Title: gksu crashed with SIGSEGV in g_closure_invoke()
Uname: Linux 2.6.27-4-generic x86_64
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev powerdev scanner tape video