The spec for the method LookAndFeel.makeKeyBindings(Object[] keyBindingList) says:
"If keyBindingList's length is odd, the last element is ignored."
In fact JDK 6.0 b98 throws ArrayIndexOutOfBoundsException while passing array with odd length to the method:
        final Object[] keyActionArray = {
                "UP", DefaultEditorKit.upAction,
                KeyStroke.getKeyStroke("DOWN"), DefaultEditorKit.downAction,
                "PAGE_UP"
        };

        JTextComponent.KeyBinding[] keyBindingsArray =
                LookAndFeel.makeKeyBindings(keyActionArray);