Gnome panel crashes when trying to add a icon to the gnome panel bar

Debugging Information:

Backtrace was generated from '/usr/bin/gnome-panel'

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1223838016 (LWP 5727)]
[New Thread -1247978576 (LWP 5730)]
0xffffe410 in __kernel_vsyscall ()
#0 0xffffe410 in __kernel_vsyscall ()
#1 0xb7ccc48b in __waitpid_nocancel ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2 0xb7f45746 in libgnomeui_module_info_get ()
   from /usr/lib/libgnomeui-2.so.0
#3 <signal handler called>
#4 0xb7807c18 in g_markup_escape_text () from
/usr/lib/libglib-2.0.so.0
#5 0xb780a159 in g_markup_vprintf_escaped () from
/usr/lib/libglib-2.0.so.0
#6 0xb780a2b6 in g_markup_printf_escaped () from
/usr/lib/libglib-2.0.so.0
#7 0x080a1b4b in panel_lockdown_notify_remove ()
#8 0x080a2105 in panel_lockdown_notify_remove ()
#9 0x080a2f6e in panel_addto_add_item ()
#10 0x080a30ee in panel_addto_add_item ()
#11 0xb7879423 in g_cclosure_marshal_VOID__VOID ()
   from /usr/lib/libgobject-2.0.so.0
#12 0xb786d79f in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#13 0xb787c2ea in g_signal_stop_emission () from
/usr/lib/libgobject-2.0.so.0
#14 0xb787db19 in g_signal_emit_valist () from
/usr/lib/libgobject-2.0.so.0
#15 0xb787de89 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#16 0xb7a4849f in gtk_button_clicked () from
/usr/lib/libgtk-x11-2.0.so.0
#17 0xb7a49cda in _gtk_button_set_depressed ()
   from /usr/lib/libgtk-x11-2.0.so.0
#18 0xb7879423 in g_cclosure_marshal_VOID__VOID ()
   from /usr/lib/libgobject-2.0.so.0
#19 0xb786d16f in g_cclosure_new_swap () from
/usr/lib/libgobject-2.0.so.0
#20 0xb786d79f in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#21 0xb787c5cc in g_signal_stop_emission () from
/usr/lib/libgobject-2.0.so.0
#22 0xb787db19 in g_signal_emit_valist () from
/usr/lib/libgobject-2.0.so.0
#23 0xb787de89 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#24 0xb7a4841c in gtk_button_released () from
/usr/lib/libgtk-x11-2.0.so.0
#25 0xb7a4938c in _gtk_button_paint () from
/usr/lib/libgtk-x11-2.0.so.0
#26 0xb7b09610 in _gtk_marshal_BOOLEAN__BOXED ()
   from /usr/lib/libgtk-x11-2.0.so.0
#27 0xb786d16f in g_cclosure_new_swap () from
/usr/lib/libgobject-2.0.so.0
#28 0xb786d79f in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#29 0xb787c9ce in g_signal_stop_emission () from
/usr/lib/libgobject-2.0.so.0
#30 0xb787d886 in g_signal_emit_valist () from
/usr/lib/libgobject-2.0.so.0
#31 0xb787de89 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#32 0xb7beba0f in gtk_widget_activate () from
/usr/lib/libgtk-x11-2.0.so.0
#33 0xb7b07d8d in gtk_propagate_event () from
/usr/lib/libgtk-x11-2.0.so.0
#34 0xb7b0819b in gtk_main_do_event () from
/usr/lib/libgtk-x11-2.0.so.0
#35 0xb79aaddc in _gdk_events_queue () from
/usr/lib/libgdk-x11-2.0.so.0
#36 0xb7803876 in g_main_context_dispatch () from
/usr/lib/libglib-2.0.so.0
#37 0xb7806936 in g_main_context_check () from
/usr/lib/libglib-2.0.so.0
#38 0xb7806c58 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#39 0xb7b07495 in gtk_main () from ...

Bug buddy dump.

Thanks for the bug report. This particular bug has already been reported into our bug tracking system, but please feel free to report any further bugs you find.

What locale do you use? That bug happens only some people, that would be nice if somebody getting it could try to debug it. Do you know how to use valgrind and rebuild a package with some changes to work on it?

I use :
LANG=fr_FR@euro
LANGUAGE=fr_FR:fr

Sorry for the double entry.

No I do not know how to use Valgrind, sorry.

I have the same error: when I try to add a new item, gnome-panel crash and reload it.

I use:
LANG=es_CL.ISO-8859-1
LANGUAGE=es_CL:es

Thanks!