custom 403 page not displayed

custom 403 page should be displayed even the user does not have the "access content" permission

repro:
1. node/add/page - create node for custom 403 page
2. admin/settings/error-reporting - set this node as Default 403 (access denied) page
3. admin/user/permissions - remove "access content" permission for anonymous user
4. logout - bug: the "acces denied" page is not our custom page