GLib Improvements

Unicode manipulation functions
Coding set conversion functions
More complete thread library
GMarkup: tiny XML-like parser

GError: good error messages on failure

if (!g_file_get_contents (filename, &text, &length, &error))
  {
    GtkWidget = gtk_message_dialog_new (parent, GTK_DIALOG_MODAL, GTK_MESSAGE_ERROR,
	                                GTK_BUTTONS_OK, "%s",
	                                error->message);
    gtk_dialog_run (dialog);
    gtk_widget_destroy (dialog);
    g_clear_error (&error);
  }