I have a problem with SharePoint 2007 Beta 2 TR that I've not
encountered before.

I have created a Master Page and Page Layout in SharePoint Designer
Beta 2 TR and used them within our SharePoint site. If I navigate to
a page that uses these from with the Site Settings area of the site I
can see the page with no problem. However, if I navigate to the page
that uses these from a new browser window I get a blank page. When
viewing source on the blank page it is apparent that the Master Page
has been used to construct the layout but the content isn't being
pulled in.

I suspect that there is an issue with the link between the Master
Page, Page Layout and Content Type for the following reason:

In SharePoint Designer if I click on Page Fields in the Server
Controls section of the toolbox I get the following error:

------------------------------------------------------
soap:ServerThe associated content type
(id=0x01010007FF3E057FA8AB4AA42FCB67B453FFC100E214EEE741181F4E9F7ACC43
278EE81100C30B3ED219B6804E84680DDC73A87DC3, name=Standard Content)
for page layout http://eng-
mnpadev01:4000/_catalogs/masterpage/StandardContent.aspx does not
exist. Edit the property of the page layout and change the content
type to a valid value.
------------------------------------------------------

Has anyone encountered this before?

I've checked IIS server extensions on the Web Front End, and checked
all of the properties on the Master Page and Page Layout.