I see GTK and GDK warnings when I run some RTI applications, is this normal?

When running some of the RTI tools on Linux (e.g. RTI Shapes Demo, RTI Launcher) you may see the following or similar warning messages thrown by GTK/GDK:

(Gtk-CRITICAL **: IA__gtk_widget_get_direction: assertion `GTK_IS_WIDGET (widget)' failed)


Gdk-WARNING **: gdk_window_set_icon_list: icons too large

These messages are harmless and won't affect the application's behavior.