default_zone = calendar_config_get_icaltimezone (); tmp1 = icaltimezone_get_display_name(default_zone); // tmp = icaltimezone_get_display_name (zone); if(strcmp(tmp,tmp1)!=0) { //tmp = icaltimezone_get_location(zone); tmp2 = g_strdup_printf(_("Timezone: %s %s"), dtstart.tzid, tmp1); hbox = gtk_hbox_new (FALSE, 0); gtk_box_pack_start ((GtkBox *)hbox, gtk_label_new_with_mnemonic (tmp2), FALSE, FALSE, 0); ebox = gtk_event_box_new (); gtk_container_add ((GtkContainer *)ebox, hbox); gtk_box_pack_start ((GtkBox *)box, ebox, FALSE, FALSE, 0); g_free (tmp); g_free (tmp2); } g_free(tmp1); ====== This code crashed evolution without tooltip being displayed======