Following the update in July for hiding the 100km numbers from the gridline labels, it seems the same fix broke the sub KM lines, thanks to a comment on the original post for letting me know.
Anyway, the online hosted version has been updated (and checked at all scales as best I can!), and the same file pushed into the downloadable zip for the offline version, so can download the latest code from the file. And just for completeness the diff.
