When I prewiew or print a stamped document, the stamp is hidden by a graphic or shaded table. Why?
This is a limitation of Word of displaying a graphic in a header. To workaround this, change your StampIt settings to “Stamp Every Page.” Start StampIt, click Options > click the radio button in the top section of the dialog (Stamp Every Page). The default is “Let StampIt Decide.” This setting will stay until you change it. For large documents, this method of marking takes more time to process as StampIt is analyzing each page.