In Beta 2, the page editor for creating a new page will be shown under a tab called "New" rather than the parent node's Edit tab. The New tab is not linked, and the Edit tab for the parent can be switched to.
The phrase "New" is used rather than "Create" here because normally the "Create" tab appears when attempting to view a page that doesn't exist yet -- but in the editor view, the parent node already exists so it doesn't need creating.
Additionally, extra tabs linking to controls for the parent node are removed from this view (aside from the main tab that links back to the node).