TYPO3 Core

MountPoints are an outstanding feature
of typo3-pages for content-rich webpages.

But in typo3 4.5.2 when choosing the page-typ :Mount Point:
the page still shows its own content.

When choosing
Show Content from :Mounted Page:
we get
:Oops, an error occured!:
:The requested page does not exist!:

and the only possible action to do with
the MountPoint-page is to delete it.

The feature of Standard-pages within the
:Appearance-tab:Replace Content - Show Content from Page:
is still working, but this section now is hidden
when the page-typ changes to :Mount Point: