diff --git a/ChangeLog b/ChangeLog
index a60f093..899ca4d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-01-09  Lucas Rocha  <lucasr@gnome.org>
+
+	* src/tree.c:
+	GNOME Goal: Remove deprecated GLib symbols (Fixes bug #560452).
+	Patch from Frederic Peters <fpeters@0d.be>.
+
 2009-01-09  Lucas Rocha  <lucasr@gnome.org>
 
 	* src/main.c:
diff --git a/src/tree.c b/src/tree.c
index 65e9c47..3237cde 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -150,7 +150,7 @@ zenity_tree_handle_stdin (GIOChannel  *channel,
       }
 
       if (toggles && column_count == 0) {
-        if (strcmp (g_strdown (zenity_util_strip_newline (string->str)), "true") == 0)
+        if (strcmp (g_ascii_strdown (zenity_util_strip_newline (string->str), -1), "true") == 0)
           gtk_list_store_set (GTK_LIST_STORE (model), &iter, column_count, TRUE, -1);
         else
           gtk_list_store_set (GTK_LIST_STORE (model), &iter, column_count, FALSE, -1);
@@ -228,7 +228,7 @@ zenity_tree_fill_entries (GtkTreeView  *tree_view,
     for (j = 0; j < n_columns; j++) {
         
       if (toggles && j == 0) {
-        if (strcmp (g_strdown ((gchar *) args[i+j]), "true") == 0)
+        if (strcmp (g_ascii_strdown ((gchar *) args[i+j], -1), "true") == 0)
           gtk_list_store_set (GTK_LIST_STORE (model), &iter, j, TRUE, -1);
         else 
           gtk_list_store_set (GTK_LIST_STORE (model), &iter, j, FALSE, -1);
@@ -302,7 +302,7 @@ zenity_tree (ZenityData *data, ZenityTreeData *tree_data)
   n_columns = g_slist_length (tree_data->columns);
 
   if (tree_data->print_column) {
-    if (strcmp (g_strdown (tree_data->print_column), "all") == 0)
+    if (strcmp (g_ascii_strdown (tree_data->print_column, -1), "all") == 0)
       print_all_columns = TRUE;
     else 
       print_columns = zenity_tree_extract_column_indexes (tree_data->print_column, n_columns);