If we open the publishing page in Sharepoint Designer and Detach from Page Layout, when you modify the page then save and check-in the page, the URL ref to http://dev09.4444/_catalogs/masterpage/BlankWebPartPage.aspx ? rather than refering to /_catalogs/masterpage/BlankWebPartPage.aspx. Soultion is Reattcah the page layout then check-in and publish.