Inaccessible node changes theme

If this should be posted somewhere else, please let me know.

If a user navigates to a node which is not accessible, the theme of the node that can't be accessed is nonetheless displayed. I would prefer if the content area which displays "You are not authorized to access this page." was displayed either in the theme of the prior node or in the default theme. But displaying the theme associated with the inaccessible node leads to strange results (for example, blocks that should not be displayed are displayed).

I then set up a specific node for unauthorized access. That node shows up fine when an attempt to access an unauthorized node is attempted. But even though the specific node that I set up is of node type "page" and even though I have taxonomy_theme set to display the default theme for all nodes of type "page", the theme that is displayed is the theme associated with the unauthorized node.

Is this a bug or by design?