Thanks, Neutron. That didn't do it, however. I've found that what has changed is that I set my clipboard extender, CLCL, to handle Rich Text format. In so doing, Word now records the location of the text, via bookmark, as if it were an OLE object to be accessed, for some reason. I've found many instances of people complaining about it, and MS appears to be unmotivated to change the behavior.
What I've done is hide bookmarks, and then attach a macro to the CTRL-s Save function wiping all the OLE_Link# bookmarks.