I hope not to have mistaken :) :

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

Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 46912581221680 (LWP 18736)]
[New Thread 1074006368 (LWP 18741)]
0x00002aaaacd090ca in waitpid () from /lib/libpthread.so.0
#0  0x00002aaaacd090ca in waitpid () from /lib/libpthread.so.0
#1  0x00002aaaaad316d7 in libgnomeui_module_info_get ()
   from /usr/lib/libgnomeui-2.so.0
#2  <signal handler called>
#3  0x00002aaaac98d24d in g_markup_escape_text ()
   from /usr/lib/libglib-2.0.so.0
#4  0x000000000045fef9 in panel_addto_present_applets (dialog=0xba7090)
    at /build/buildd/gnome-panel-2.14.1/./gnome-panel/panel-addto.c:405
#5  0x00000000004617db in panel_addto_present (item=<value optimized
out>, 
    panel_widget=0x683c50)
    at
/build/buildd/gnome-panel-2.14.1/./gnome-panel/panel-addto.c:1498
#6  0x00002aaaac82a910 in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
#7  0x00002aaaac839af2 in g_signal_stop_emission ()
   from /usr/lib/libgobject-2.0.so.0
#8  0x00002aaaac83afcc in g_signal_emit_valist ()
   from /usr/lib/libgobject-2.0.so.0
#9  0x00002aaaac83b383 in g_signal_emit () from
/usr/lib/libgobject-2.0.so.0
#10 0x00002aaaabe1827a in gtk_widget_activate ()
   from /usr/lib/libgtk-x11-2.0.so.0
#11 0x00002aaaabd488a8 in gtk_menu_shell_activate_item ()
   from /usr/lib/libgtk-x11-2.0.so.0
#12 0x00002aaaabd48bda in gtk_menu_shell_activate_item ()
   from /usr/lib/libgtk-x11-2.0.so.0
#13 0x00002aaaabd39830 in _gtk_marshal_BOOLEAN__BOXED ()
   from /usr/lib/libgtk-x11-2.0.so.0
#14 0x00002aaaac82a910 in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
#15 0x00002aaaac839c9d in g_signal_stop_emission ()
   from /usr/lib/libgobject-2.0.so.0
#16 0x00002aaaac83ad0c in g_signal_emit_valist ()
   from /usr/lib/libgobject-2.0.so.0
#17 0x00002aaaac83b383 in g_signal_emit () from
/usr/lib/libgobject-2.0.so.0
#18 0x00002aaaabe18445 in gtk_widget_activate ()
   from /usr/lib/libgtk-x11-2.0.so.0
#19 0x00002aaaabd37c3b in gtk_propagate_event ()
   from /usr/lib/libgtk-x11-2.0.so.0
#20 0x00002aaaabd380b7 in gtk_main_do_event ()
   from /usr/lib/libgtk-x11-2.0.so.0
#21 0x00002aaaac0842ac in _gdk_events_queue ()
   from /usr/lib/libgdk-x11-2.0.so.0
#22 0x00002aaaac988bad in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#23 0x00002aaaac98be75 in g_main_context_check ()
   from /usr/lib/libglib-2.0.so.0
#24 0x00002aaaac98c13a in g_main_loop_run () from
/usr/lib/libglib-2.0.so.0
#25 0x00002aaaabd374a2 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#26 0x00000000004254a2 in main (argc=5, argv=0x7fffffe09028)
    at /build/buildd/gnome-panel-2.14.1/./gnome-panel/main.c:92

Thread 2 (Thread 1074006368 (LWP 18741)):
#0  0x00002aaaaced1e22 in poll () from /lib/libc.so.6
No symbol table info available.
#1  0x00002aaaac98bcb0 in g_main_context_check ()
   from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#2  0x00002aaaac98c13a in g_main_loop_run () from
/usr/lib/libglib-2.0.so.0
No symbol table info available.
#3  0x00002aaaab9deb90 in link_thread_io_context ()
   from /usr/lib/libORBit-2.so.0
No symbol table info available.
#4  0x00002aaaac9a4bcb in g_static_private_free ()
   from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#5  0x00002aaaacd030fa in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#6  0x00002aaaacedace2 in clone () from /lib/libc.so.6
No symbol table info available.
#7  0x0000000000000000 in ?? ()
No symbol table info available.

Thread 1 (Thread 46912581221680 (LWP 18736)):
#0  0x00002aaaacd090ca in waitpid () from /lib/libpthread.so.0
No symbol table info available.
#1  0x00002aaaaad316d7 in libgnomeui_module_info_get ()
   from /usr/lib/libgnomeui-2.so.0
No symbol table info available.
#2  <signal handler called>
No symbol table info available.
#3  0x00002aaaac98d24d in g_markup_escape_text ()
   from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#4  0x000000000045fef9 in panel_addto_present_applets (dialog=0xba7090)
    at /build/buildd/gnome-panel-2.14.1/./gnome-panel/panel-addto.c:405
	info = (Bonobo_ServerInfo *) 0xc42e70
	category = 0xa08c48 "Utilità"
	applet = <value optimized out>
	name = 0xa08c08 "Tavolozza caratteri"
	description = 0xa08c28 "Per inserire caratteri"
	english_category = 0xc52581 "Utilities"
	icon = 0xc525c1 "charpick.png"
#5  0x00000000004617db in panel_addto_present (item=<value optimized
out>, 
    panel_widget=0x683c50)
    at
/build/buildd/gnome-panel-2.14.1/./gnome-panel/panel-addto.c:1498
	dialog = (PanelAddtoDialog *) 0xba7090
	pd = (PanelData *) 0x658be0
	sw_adjustment = <value optimized out>
	screen = (GdkScreen *) 0x5dc010
	screen_height = <value optimized out>
	height = 540
#6  0x00002aaaac82a910 in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#7  0x00002aaaac839af2 in g_signal_stop_emission ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#8  0x00002aaaac83afcc in g_signal_emit_valist ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#9  0x00002aaaac83b383 in g_signal_emit () from
/usr/lib/libgobject-2.0.so.0
No symbol table info available.
#10 0x00002aaaabe1827a in gtk_widget_activate ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#11 0x00002aaaabd488a8 in gtk_menu_shell_activate_item ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#12 0x00002aaaabd48bda in gtk_menu_shell_activate_item ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#13 0x00002aaaabd39830 in _gtk_marshal_BOOLEAN__BOXED ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#14 0x00002aaaac82a910 in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#15 0x00002aaaac839c9d in g_signal_stop_emission ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#16 0x00002aaaac83ad0c in g_signal_emit_valist ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#17 0x00002aaaac83b383 in g_signal_emit () from
/usr/lib/libgobject-2.0.so.0
No symbol table info available.
#18 0x00002aaaabe18445 in gtk_widget_activate ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#19 0x00002aaaabd37c3b in gtk_propagate_event ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#20 0x00002aaaabd380b7 in gtk_main_do_event ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#21 0x00002aaaac0842ac in _gdk_events_queue ()
   from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#22 0x00002aaaac988bad in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#23 0x00002aaaac98be75 in g_main_context_check ()
   from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#24 0x00002aaaac98c13a in g_main_loop_run () from
/usr/lib/libglib-2.0.so.0
No symbol table info available.
#25 0x00002aaaabd374a2 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#26 0x00000000004254a2 in main (argc=5, argv=0x7fffffe09028)
    at /build/buildd/gnome-panel-2.14.1/./gnome-panel/main.c:92
	context = <value optimized out>
	program = (GnomeProgram *) 0x59b010
#0  0x00002aaaacd090ca in waitpid () from /lib/libpthread.so.0