Tried it, but still having the same problem.
Does Live Preflight catch them (you may need to set up a preflight profile to look for them)? If so, there should be a link to the locations. It's also possible that by coincidence the prefs are corrupt and the panel is simply blank for that reason (it happens...), so see Replace Your Preferences
You can take a look to: InDesign [on "Wisibility" french forum. Post: ... "références croisées non résolues ou obsolètes"... ].
A funny tip of a guy named Super Marius, apparently a mechanic who tinkers cars and xml files!