One of the real life scenario in SharePoint 2007 deployments for internet sites is the power users creating pages on different areas of the site but more probably they do not have rights on the home page as it is strictly controlled by the SharePoint Administrators. The page layouts are created by the SharePoint Administrators and sometime the Administrators change the permissions of Master Page and Page layout Gallery. This will most probably resulted in Contributors or event designer get “Access Denied Error” When they try to create a page on any sub site on publishing portal. So If you receive this error sometime WRT to power users simply create a SharePoint Group with Read Permission on the home site and then add this group to the permissions of Master Page Gallery with read permissions. They will be able to create pages easily.