With 2 documents, Word 2007 has all of the font setting controls disabled (grayed out). If you select any text, or try to insert new text, you cannot adjust the font, size, bold and any other attributes as you can't click on them. However, clicking on a Style button works.
Other documents are fine, and these have "unrestricted access" checked under the review tab, just like other documents. You can actually modify the document by inserting text; you just can set font attributes.
Any ideas ?