bzr-notify crashed with SIGSEGV in g_type_get_qdata()

This might be a duplicate of bug 903444, but I see a stack trace that is not described in that bug. bzr-gtk tip should not be importing any gtk2.

/usr/lib/python2.7/dist-packages/gobject/constants.py:24: Warning: g_boxed_type_register_static: assertion `g_type_from_name (name) == 0' failed
  import gobject._gobject

** WARNING **: Trying to register gtype 'GMountMountFlags' as enum when in fact it is of type 'GFlags'

** WARNING **: Trying to register gtype 'GDriveStartFlags' as enum when in fact it is of type 'GFlags'
/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: specified class size for type `PyGtkGenericCellRenderer' is smaller than the parent type's `GtkCellRenderer' class size
  from gtk import _gtk
/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:40: Warning: g_type_get_qdata: assertion `node != NULL' failed
  from gtk import _gtk
Segmentation fault (core dumped)

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: bzr-gtk 0.103.0+bzr769-1
ProcVersionSignature: Ubuntu 3.2.0-12.21-generic 3.2.2
Uname: Linux 3.2.0-12-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CrashCounter: 1
Date: Fri Feb 3 10:08:41 2012
ExecutablePath: /usr/bin/bzr-notify
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/bzr-notify
SegvAnalysis:
 Segfault happened at: 0x7fac76a1959b <vfprintf+155>: callq 0x7fac76a61c80 <strchrnul>
 PC (0x7fac76a1959b) ok
 source "0x7fac76a61c80" (0x7fac76a61c80) ok
 destination "(%rsp)" (0x7fffe933efb0) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: bzr-gtk
StacktraceTop:
 g_type_get_qdata () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/python2.7/dist-packages/gobject/_gobject.so
 ?? () from /usr/lib/python2.7/dist-packages/gobject/_gobject.so
 ?? () from /usr/lib/python2.7/dist-packages/gobject/_gobject.so
 ?? () from /usr/lib/python2.7/dist-packages/gobject/_gobject.so
Title: bzr-notify crashed with SIGSEGV in g_type_get_qdata()
UpgradeStatus: Upgraded to precise on 2012-02-03 (0 days ago)
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