Currently with the addition of the externalisation of content pages. I (Brad Jones), have introduced a slight bug.
When you have DevMode turned ON, and you create a new page you will have to open it up again and save it again.
Otherwise you will just see a blank file.

I believe this has something to do with the Event `ContentEditPost`,
there does not appear to be the equilivant of `AddTemplatePost` and `AddStylesheetPost`.