python2.7 crashed with SIGSEGV in g_object_unref()

[discont]

May be gajim related. Gajim 0.15 beta2 crashed.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: python2.7-minimal 2.7.2-5ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-13.22-generic-pae 3.0.6
Uname: Linux 3.0.0-13-generic-pae i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
CheckboxSubmission: 32b2b5d4dec078676ee5a1a9cbe277bc
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
Date: Tue Nov 15 14:52:56 2011
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/python2.7
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcCmdline: /usr/bin/python -OO gajim.py
ProcCwd: /usr/share/gajim/src
SegvAnalysis:
 Segfault happened at: 0xb6d0350a <g_object_unref+26>: mov (%esi),%eax
 PC (0xb6d0350a) ok
 source "(%esi)" (0x000002d7) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: python2.7
StacktraceTop:
 g_object_unref () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
 gtk_tree_store_set_value () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
 ?? () from /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/_gtk.so
Title: python2.7 crashed with SIGSEGV in g_object_unref()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers

[Apport retracing service (apport)]

StacktraceTop:
 g_object_unref (_object=0x2d7) at /build/buildd/glib2.0-2.30.0/./gobject/gobject.c:2680
 _gtk_tree_data_list_value_to_node (list=0xb2d8800, value=0xbf901c1c) at /build/buildd/gtk+2.0-2.24.6/gtk/gtktreedatalist.c:239
 gtk_tree_store_real_set_value (tree_store=0xa299700, iter=0xa2621ec, column=<optimized out>, value=0xbf901c1c, sort=1) at /build/buildd/gtk+2.0-2.24.6/gtk/gtktreestore.c:825
 IA__gtk_tree_store_set_value (tree_store=0xa299700, iter=0xa2621ec, column=0, value=0xbf901c1c) at /build/buildd/gtk+2.0-2.24.6/gtk/gtktreestore.c:860
 pygtk_tree_model_row_setitem (self=0xa2621e0, column=0, pyvalue=<gtk.Image at remote 0xa002eb4>) at /build/buildd/pygtk-2.24.0/gtk/gtk-types.c:1081