Steps to reproduce:
1.Login as a new user 
2.Setup a local mail account with message filters enabled. 
3.Select Edit, Message Filters, Add


Stack trace:
 fef131c7 _lwp_kill (1, 5) + 7
 feec8352 raise    (5) + 22
 fecb6a5e g_logv   (fa2e60a8, 8, fa2e6080, 804616c) + 2aa
 fecb6b2d g_log    (fa2e60a8, 8, fa2e6080, fa2e6074, 132, fa2e6030) + 25
 fa2dedd6 camel_url_new (8536e18, 0) + 5a
 f97d2e78 em_utils_folder_name_from_uri (8536e18) + 24
 f97a891d set_contents (8164c90) + 29
 f97a8e73 em_folder_selection_button_set_selection (8164c90, 8536f18) + 5b
 f97a2f49 get_widget (84e0fb0) + 5d
 f9878e19 filter_element_get_widget (84e0fb0) + 11
 f987bf91 filter_part_get_widget (853ee80) + 39
 f97a3768 get_rule_part_widget (831ecf0, 853ee80, 830d750) + 54
 f97a3ddd get_widget (830d750, 831ecf0) + 2a1
 f987dad0 filter_rule_get_widget (830d750, 831ecf0) + 14
 f9880760 rule_add (8497820, 82f5338) + 5c
 fec24a15 g_cclosure_marshal_VOID__VOID (8540d38, 0, 1, 80464dc, 804643c, 0) + 55
 fec0f263 g_closure_invoke (8540d38, 0, 1, 80464dc, 804643c) + 107
 fec2429a signal_emit_unlocked_R (81165d8, 0, 8497820, 0, 80464dc) + 7b2
 fec23540 g_signal_emit_valist (8497820, 8e, 0, 8046748) + 8c4
 fec236d5 g_signal_emit (8497820, 8e, 0) + 25
 fe6c47ec gtk_button_clicked (8497820) + 38
 fe6c561c gtk_real_button_released (8497820, 80b1aa8) + 38
 fec24a15 g_cclosure_marshal_VOID__VOID (81529f0, 0, 1, 804691c, 804687c, fe6c55e4) + 55
 fec0f544 g_type_class_meta_marshal (81529f0, 0, 1, 804691c, 804687c, 1a4) + 40
 fec0f263 g_closure_invoke (81529f0, 0, 1, 804691c, 804687c) + 107
 fec23f68 signal_emit_unlocked_R (81165a8, 0, 8497820, 0, 804691c) + 480
 fec23540 g_signal_emit_valist (8497820, 8d, 0, 8046b88) + 8c4
 fec236d5 g_signal_emit (8497820, 8d, 0) + 25
 fe6c4780 gtk_button_released (8497820) + 38
 fe6c5484 gtk_button_button_release (8497820, 83308f8, 80b09f0) + 24
 fe77d47c _gtk_marshal_BOOLEAN__BOXED (8123d88, 8046ca0, 2, 8046d5c, 8046cbc, fe6c5460) + 70
 fec0f544 g_type_class_meta_marshal (8123d88, 8046ca0, 2, 8046d5c, 8046cbc, b4) + 40
 fec0f263 g_closure_invoke (8123d88, 8046ca0, 2, 8046d5c, 8046cbc) + 107
 fec2445e signal_emit_unlocked_R (80fcc28, 0, 8497820, 8046edc, 8046d5c) + 976
 fec232de g_signal_emit_valist (8497820, 3c, 0, 8046fd0) + 662
 fec236d5 g_signal_emit (8497820, 3c, 0, 83308f8, 8046ff4) + 25
 fe889bd5 gtk_widget_event_internal (8497820, 83308f8) + 20d
 fe889869 gtk_widget_event (8497820, 83308f8) + 99
 fe77c0cc gtk_propagate_event (8497820, 83308f8) + 98
 fe77b138 gtk_main_do_event (83308f8, 0) + 360
 fe5a89ee gdk_event_dispatch (809fcb8, 0, 0) + 56
 fecae774 g_main_dispatch (80a3af0) + 1e0
 fecaf875 g_main_context_dispatch (80a3af0) + 85
 fecafc92 g_main_context_iterate (80a3af0, 1, 1, 80800c8) + 3ce
 fecb0294 g_main_loop_run (813ccc8) + 1b8
 fee1364d bonobo_main (8047358, 8047240, feffb7c8, 0, 0, 0) + 5d
 080676fd main     (1, 8047284, 804728c) + 3f5
 0805c0d6 _start   (1, 80473c0, 0, 80473ca, 80473eb, 8047449) + 7a

Other information: