You may as well access all of the story ranges in the document as there could be changes in some of them in addition to the ones in the Headers and Footers.


See the article "Using a macro to replacetext where ever it appears in a document including Headers, Footers, Textboxes,etc.” at:

http://www.word.mvps.org/FAQs/MacrosVBA/FindReplaceAllWithVBA.htm