I have the same problem here. I can confirm what PeTe has said. Unchecking the attribute "Protected against manual changes" in the properties of the Table Of Contents solves the problem, after save, close and reopen the document it is editable again.
I have the same problem here. I can confirm what PeTe has said. Unchecking the attribute "Protected against manual changes" in the properties of the Table Of Contents solves the problem, after save, close and reopen the document it is editable again.