Comment 2 for bug 882177

StacktraceTop:
 gtk_notebook_button_release (event=0x1fd3630, widget=0xf17110) at /build/buildd/gtk+3.0-3.2.0/./gtk/gtknotebook.c:3183
 gtk_notebook_button_release (widget=0xf17110, event=0x1fd3630) at /build/buildd/gtk+3.0-3.2.0/./gtk/gtknotebook.c:3168
 _gtk_marshal_BOOLEAN__BOXED (closure=0xe26530, return_value=0x7fff9b308140, n_param_values=<optimized out>, param_values=0x146ae90, invocation_hint=<optimized out>, marshal_data=<optimized out>) at /build/buildd/gtk+3.0-3.2.0/./gtk/gtkmarshalers.c:85
 g_closure_invoke (closure=0xe26530, return_value=0x7fff9b308140, n_param_values=2, param_values=0x146ae90, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.30.0/./gobject/gclosure.c:774
 signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=0xf17110, emission_return=0x7fff9b3082a0, instance_and_params=0x146ae90) at /build/buildd/glib2.0-2.30.0/./gobject/gsignal.c:3310