New Post: Default content in page types

Thats as may be ... however as I stated in my original post the "placeholder" attribute (well tag really) in the Masterpage does not work.

So this does not work : <rendering:placeholder id="contentplaceholder"/>

this does work : <c1:Render Markup="<%# contentplaceholder%>" runat="server" />

I guess I'm looking for confirmation that <rendering:placeholder> does not work in current versions or an example of how it should be used correctly.

<c1:Render Markup> does work but its not documented so I would rather not have it in production code if the next update can potentially break my code.