[Notjohn]

I checked my toc.nx against an earlier book and noticed a seeming omission. I added the line:

</navLabel>

to close out a label, then ran epubcheck again. All the earlier errors had vanished, and now I get flagged four times for what seems the same error:

The element type "navMap" must be terminated by the matching end-tag "</navMap>".

This seems very strange because the flagged line 51 is NOT the end of the map, and </navMap> does indeed appear where I think it ought to be, on line 112 just before the terminating line </ncx>

Perhaps it's obvious, but I have never before had occasion to edit the toc.ncx file!