Hi,
Below is an XML fragment wrapped in 'pre' tags. In preview it's not visible (with or without enclosing pre tags)

  <!--
    <Window.Background>
        <VisualBrush>
            <VisualBrush.Visual>
                <MediaElement Source="intro.wmv" />
            </VisualBrush.Visual>
        </VisualBrush>
    </Window.Background>
    <Window.Title>Test 1</Window.Title>
    -->

  <!--<Window.Style>
        <Style TargetType="{x:Type Window}" >
            <Setter Property="Background">
                <Setter.Value>
                    Red
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Style>
    -->

And here's another junk that *does* show up:

<Test>This is a test</Test>

I've no idea whether the first section will actually be visible when posted but, if it is, can someone tell me why it doesn't show up in preview?

UPDATE: OK - in the posted version two commented-out sections ARE visible. The post included another section that was *not* commented and that isn't visible (in preview mode before sending nothing was visible)
TIA,
Viv