Index: gtktreestore.c
===================================================================
--- gtktreestore.c	(revision 20916)
+++ gtktreestore.c	(working copy)
@@ -1070,6 +1070,7 @@ gtk_tree_store_set_valist (GtkTreeStore 
  * The list is terminated by a -1. For example, to set column 0 with type
  * %G_TYPE_STRING to "Foo", you would write 
  * <literal>gtk_tree_store_set (store, iter, 0, "Foo", -1)</literal>.
+ * The value will be copied or referenced by the store if appropriate.
  **/
 void
 gtk_tree_store_set (GtkTreeStore *tree_store,
Index: gtkliststore.c
===================================================================
--- gtkliststore.c	(revision 20916)
+++ gtkliststore.c	(working copy)
@@ -923,6 +923,7 @@ gtk_list_store_set_valist (GtkListStore 
  * The list is terminated by a -1. For example, to set column 0 with type
  * %G_TYPE_STRING to "Foo", you would write <literal>gtk_list_store_set (store, iter,
  * 0, "Foo", -1)</literal>.
+ * The value will be copied or referenced by the store if appropriate.
  **/
 void
 gtk_list_store_set (GtkListStore *list_store,
